2008 Lexus RX 400h FWDFACTORY OEM SERVICE PROCEDURE

Diagnostic Trouble Code Chart

HINT:

Parameters listed in the chart may be different from your readings depending on the type of instruments and other factors.

If any DTCs are displayed during a check mode, check the circuit for the DTCs listed in the table below. For details of each DTC, refer to the links below.

SFI SYSTEM: 

DIAGNOSTIC TROUBLE CODE CHART

DTC Code Detection Item Trouble Area MIL Memory
P0010  Camshaft Position "A" Actuator Circuit (Bank 1)
  1. Open or short in OCV (bank 1) circuit
  2. OCV (bank 1)
  3. HV control ECU
 Come on DTC stored
P0011  Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)
  1. Valve timing
  2. Oil Control Valve (OCV) (bank 1)
  3. OCV filter (bank 1)
  4. Intake camshaft (bank 1) timing gear assembly
  5. HV control ECU
 Come on DTC stored
P0012  Camshaft Position "A" - Timing Over-Retarded (Bank 1)
  1. Valve timing
  2. Oil Control Valve (OCV) (bank 1)
  3. OCV filter (bank 1)
  4. Intake camshaft (bank 1) timing gear assembly
  5. HV control ECU
 Come on DTC stored
P0016  Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
  1. Mechanical system (Timing belt has jumped tooth or chain stretched)
  2. Valve timing
  3. Oil Control Valve (OCV)
  4. OCV filter
  5. Intake camshaft timing gear assembly
  6. HV control ECU
 Come on DTC stored
P0018  Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A)
  1. Mechanical system (Timing belt has jumped tooth or chain stretched)
  2. Valve timing
  3. Oil Control Valve (OCV)
  4. OCV filter
  5. Intake camshaft timing gear assembly
  6. HV control ECU
 Come on DTC stored
P0020  Camshaft Position "A" Actuator Circuit (Bank 2)
  1. Open or short in OCV (bank 2) circuit
  2. OCV (bank 2)
  3. HV control ECU
 Come on DTC stored
P0021  Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 2)
  1. Valve timing
  2. Oil Control Valve (OCV) (bank 2)
  3. OCV filter (bank 2)
  4. Intake camshaft (bank 2) timing gear assembly
  5. HV control ECU
 Come on DTC stored
P0022  Camshaft Position "A" - Timing Over-Retarded (Bank 2)
  1. Valve timing
  2. Oil Control Valve (OCV) (bank 2)
  3. OCV filter (bank 2)
  4. Intake camshaft (bank 2) timing gear assembly
  5. HV control ECU
 Come on DTC stored
P0031  Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)
  1. Open in A/F sensor heater (bank 1 sensor 1) circuit
  2. A/F sensor heater (bank 1 sensor 1)
  3. A/F relay
  4. HV control ECU
 Come on DTC stored
P0032  Oxygen (A/F) Sensor Heater Control Circuit High (Bank 1 Sensor 1)
  1. Short in A/F sensor heater (bank 1 sensor 1) circuit
  2. A/F sensor heater (bank 1 sensor 1)
  3. A/F relay
  4. HV control ECU
 Come on DTC stored
P0037  Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2)
  1. Open in HO2 sensor heater circuit
  2. HO2 sensor heater
  3. IGCT relay
  4. HV control ECU
 Come on DTC stored
P0038  Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 2)
  1. Short in HO2 sensor heater circuit
  2. HO2 sensor heater
  3. IGCT relay
  4. HV control ECU
 Come on DTC stored
P0051  Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 2 Sensor 1)
  1. Open in A/F sensor heater (bank 2 sensor 1) circuit
  2. A/F sensor heater (bank 2 sensor 1)
  3. A/F relay
  4. HV control ECU
 Come on DTC stored
P0052  Oxygen (A/F) Sensor Heater Control Circuit High (Bank 2 Sensor 1)
  1. Short in A/F sensor heater (bank 2 sensor 1) circuit
  2. A/F sensor heater (bank 2 sensor 1)
  3. A/F relay
  4. HV control ECU
 Come on DTC stored
P0057  Oxygen Sensor Heater Control Circuit Low (Bank 2 Sensor 2)
  1. Open in HO2 sensor heater circuit
  2. HO2 sensor heater
  3. IGCT relay
  4. HV control ECU
 Come on DTC stored
P0058  Oxygen Sensor Heater Control Circuit High (Bank 2 Sensor 2)
  1. Short in HO2 sensor heater circuit
  2. HO2 sensor heater
  3. IGCT relay
  4. HV control ECU
 Come on DTC stored
P0100  Mass or Volume Air Flow Circuit
  1. Open or short in MAF meter circuit
  2. MAF meter
  3. HV control ECU
 Come on DTC stored
P0101  Mass Air Flow Circuit Range / Performance Problem MAF meter Come on DTC stored
P0102  Mass or Volume Air Flow Circuit Low Input
  1. Open in MAF meter circuit
  2. Short in MAF meter circuit
  3. MAF meter
  4. HV control ECU
 Come on DTC stored
P0103  Mass or Volume Air Flow Circuit High Input
  1. Short in MAF meter circuit (+B circuit)
  2. MAF meter
  3. HV control ECU
 Come on DTC stored
P0110  Intake Air Temperature Circuit Malfunction
  1. Open or short in I AT sensor circuit
  2. IAT sensor (built into MAF meter)
  3. HV control ECU
 Come on DTC stored
P0111  Intake Air Temperature Sensor Gradient Too High MAF meter Come on DTC stored
P0112  Intake Air Temperature Circuit Low Input
  1. Short in IAT sensor circuit
  2. IAT sensor (built into MAF meter)
  3. HV control ECU
 Come on DTC stored
P0113  Intake Air Temperature Circuit High Input
  1. Open in IAT sensor circuit
  2. IAT sensor (built into MAF meter)
  3. HV control ECU
 Come on DTC stored
P0115  Engine Coolant Temperature Circuit Malfunction
  1. Open or short in ECT sensor circuit
  2. ECT sensor
  3. HV control ECU
 Come on DTC stored
P0116  Engine Coolant Temperature Circuit Range / Performance Problem
  1. Thermostat
  2. ECT sensor
 Come on DTC stored
P0117  Engine Coolant Temperature Circuit Low Input
  1. Short in ECT sensor
  2. ECT sensor
  3. HV control ECU
 Come on DTC stored
P0118  Engine Coolant Temperature Circuit High Input
  1. Open in ECT sensor circuit
  2. ECT sensor
  3. HV control ECU
 Come on DTC stored
P011B  Engine Coolant Temperature / Intake Air Temperature Correlation
  1. IAT sensor
  2. ECT sensor
  3. ECM
 Come on DTC stored
P0120  Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction
  1. Throttle Position (TP) sensor (built into throttle body)
  2. HV control ECU
 Come on DTC stored
P0121  Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem TP sensor (built into throttle body) Come on DTC stored
P0122  Throttle / Pedal Position Sensor/ Switch "A" Circuit Low Input
  1. TP sensor (built into throttle body)
  2. Short in VTA circuit
  3. Open in VC circuit
  4. HV control ECU
 Come on DTC stored
P0123  Throttle / Pedal Position Sensor/ Switch "A" Circuit High Input
  1. TP sensor (built into throttle body)
  2. Open in VTA circuit
  3. Open in E2 circuit
  4. Short between VC and VTA circuits
  5. HV control ECU
 Come on DTC stored
P0125  Insufficient Coolant Temperature for Closed Loop Fuel Control
  1. Engine coolant temperature sensor
  2. Cooling system
  3. Thermostat
 Come on DTC stored
P0128  Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
  1. Thermostat
  2. Cooling system
  3. ECT sensor
  4. HV control ECU
 Come on DTC stored
P0136  Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2)
  1. Open or short in HO2 sensor (bank 1 sensor 2) circuit
  2. HO2 sensor (bank 1 sensor 2)
  3. HO2 sensor heater (bank 1 sensor 2)
  4. Air-Fuel ratio (A/F) sensor (bank 1 sensor 1)
  5. IGCT relay
  6. Gas leakage from exhaust system
 Come on DTC stored
P0137  Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2)
  1. Short in HO2 sensor (bank 1 sensor 2) circuit
  2. HO2 sensor (bank 1 sensor 2)
  3. HO2 sensor heater (bank 1 sensor 2)
 Come on DTC stored
P0138  Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)
  1. Short in HO2 sensor (bank 1 sensor 2) circuit
  2. HO2 sensor (bank 1 sensor 2)
  3. HO2 sensor heater (bank 1 sensor 2)
  4. A/F sensor (bank 1 sensor 1)
 Come on DTC stored
P0139  Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2)
  1. Short in heated oxygen sensor (bank 1 sensor 2) circuit
  2. Heated oxygen sensor (bank 1 sensor 2)
  3. ECM internal circuit malfunction
  4. Air fuel ratio sensor (bank 1 sensor 2)
 Come on DTC stored
P0141  Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
  1. Open or short in HO2 sensor heater circuit
  2. HO2 sensor heater
  3. IGCT relay
  4. HV control ECU
 Come on DTC stored
P0156  Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2)
  1. Open or short in HO2 sensor (bank 2 sensor 2) circuit
  2. HO2 sensor (bank 2 sensor 2)
  3. HO2 sensor heater (bank 2 sensor 2)
  4. Air-Fuel ratio (A/F) sensor (bank 2 sensor 1)
  5. IGCT relay
  6. Gas leakage from exhaust system
 Come on DTC stored
P0157  Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2)
  1. Short in HO2 sensor (bank 2 sensor 2) circuit
  2. HO2 sensor (bank 2 sensor 2)
  3. HO2 sensor heater (bank 2 sensor 2)
 Come on DTC stored
P0158  Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2)
  1. Short in HO2 sensor (bank 2 sensor 2) circuit
  2. HO2 sensor (bank 2 sensor 2)
  3. HO2 sensor heater (bank 2 sensor 2)
  4. A/F sensor (bank 2 sensor 1)
 Come on DTC stored
P0159  Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2)
  1. Short in heated oxygen sensor (bank 2 sensor 2)
  2. Heated oxygen sensor (bank 2 sensor 2)
  3. ECM internal circuit malfunction
  4. Air fuel ratio sensor (bank 2 sensor 1)
 Come on DTC stored
P0161  Oxygen Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)
  1. Open or short in HO2 sensor heater circuit
  2. HO2 sensor heater
  3. IGCT relay
  4. HV control ECU
 Come on DTC stored
P0171  System Too Lean (Bank 1)
  1. Air induction system
  2. Injector blockage
  3. Mass Air Flow (MAF) meter 4, Engine Coolant Temperature (ECT) sensor
  4. Fuel pressure
  5. Gas leakage from exhaust system
  6. Open or short in A/F sensor (bank 1 sensor 1) circuit
  7. A/F sensor (bank 1 sensor 1)
  8. A/F sensor heater (bank 1 sensor 1)
  9. A/F relay
  10. A/F sensor heater and A/F relay circuits
  11. PCV valve and hose
  12. PCV hose connections
  13. HV control ECU
 Come on DTC stored
P0172  System Too Rich (Bank 1)
  1. Injector leakage or blockage
  2. MAF meter
  3. ECT sensor
  4. Ignition system
  5. Fuel pressure
  6. Gas leakage from exhaust system
  7. Open or short in A/F sensor (bank 1 sensor 1) circuit
  8. A/F sensor (bank 1 sensor 1)
  9. A/F sensor heater (bank 1 sensor 1)
  10. A/F relay
  11. A/F sensor heater and A/F relay circuits
  12. HV control ECU
 Come on DTC stored
P0174  System Too Lean (Bank 2)
  1. Air induction system
  2. Injector blockage
  3. Mass Air Flow (MAF) meter
  4. Engine Coolant Temperature (ECT) sensor
  5. Fuel pressure
  6. Gas leakage from exhaust system
  7. Open or short in A/F sensor (bank 2 sensor 1) circuit
  8. A/F sensor (bank 2 sensor 1)
  9. A/F sensor heater (bank 2 sensor 1)
  10. A/F relay
  11. A/F sensor heater and A/F relay circuits
  12. PCV valve and hose
  13. PCV hose connections
  14. HV control ECU
 Come on DTC stored
P0175  System Too Rich (Bank 2)
  1. Injector leakage or blockage
  2. MAF meter
  3. ECT sensor
  4. Ignition system
  5. Fuel pressure
  6. Gas leakage from exhaust system
  7. Open or short in A/F sensor (bank 2 sensor 1) circuit
  8. A/F sensor (bank 2 sensor 1)
  9. A/F sensor heater (bank 2 sensor 1)
  10. A/F relay
  11. A/F sensor heater and A/F relay circuits
  12. HV control ECU
 Come on DTC stored
P0220  Throttle / Pedal Position Sensor / Switch "B" Circuit
  1. TP sensor (built into throttle body)
  2. HV control ECU
 Come on DTC stored
P0222  Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input
  1. TP sensor (built into throttle body)
  2. Short in VTA2 circuit
  3. Open in VC circuit
  4. HV control ECU
 Come on DTC stored
P0223  Throttle / Pedal Position Sensor / Switch "B" Circuit High Input
  1. TP sensor (built into throttle body)
  2. Open in VTA2 circuit
  3. Open in E2 circuit
  4. Short between VC and VTA2 circuits
  5. HV control ECU
 Come on DTC stored
P0300  Random / Multiple Cylinder Misfire Detected
  1. Open or short in engine wire harness
  2. Connector connection
  3. Vacuum hose connections
  4. Ignition system
  5. Injector
  6. Fuel pressure
  7. Mass Air Flow (MAF) meter
  8. Engine Coolant Temperature (ECT) sensor
  9. Compression pressure
  10. Valve clearance
  11. Valve timing
  12. PCV valve and hose
  13. PCV hose connections
  14. Air induction system
  15. HV control ECU
 Come on DTC stored
P0301  Cylinder 1 Misfire Detected
  1. Open or short in engine wire harness
  2. Connector connection
  3. Vacuum hose connections
  4. Ignition system
  5. Injector
  6. Fuel pressure
  7. Mass Air Flow (MAF) meter
  8. Engine Coolant Temperature (ECT) sensor
  9. Compression pressure
  10. Valve clearance
  11. Valve timing
  12. PCV valve and hose
  13. PCV hose connections
  14. Air induction system
  15. HV control ECU
 Come on DTC stored
P0302  Cylinder 2 Misfire Detected
  1. Open or short in engine wire harness
  2. Connector connection
  3. Vacuum hose connections
  4. Ignition system
  5. Injector
  6. Fuel pressure
  7. Mass Air Flow (MAF) meter
  8. Engine Coolant Temperature (ECT) sensor
  9. Compression pressure
  10. Valve clearance
  11. Valve timing
  12. PCV valve and hose
  13. PCV hose connections
  14. Air induction system
  15. HV control ECU
 Come on DTC stored
P0303  Cylinder 3 Misfire Detected
  1. Open or short in engine wire harness
  2. Connector connection
  3. Vacuum hose connections
  4. Ignition system
  5. Injector
  6. Fuel pressure
  7. Mass Air Flow (MAF) meter
  8. Engine Coolant Temperature (ECT) sensor
  9. Compression pressure
  10. Valve clearance
  11. Valve timing
  12. PCV valve and hose
  13. PCV hose connections
  14. Air induction system
  15. HV control ECU
 Come on DTC stored
P0304  Cylinder 4 Misfire Detected
  1. Open or short in engine wire harness
  2. Connector connection
  3. Vacuum hose connections
  4. Ignition system
  5. Injector
  6. Fuel pressure
  7. Mass Air Flow (MAF) meter
  8. Engine Coolant Temperature (ECT) sensor
  9. Compression pressure
  10. Valve clearance
  11. Valve timing
  12. PCV valve and hose
  13. PCV hose connections
  14. Air induction system
  15. HV control ECU
 Come on DTC stored
P0305  Cylinder 5 Misfire Detected
  1. Open or short in engine wire harness
  2. Connector connection
  3. Vacuum hose connections
  4. Ignition system
  5. Injector
  6. Fuel pressure
  7. Mass Air Flow (MAF) meter
  8. Engine Coolant Temperature (ECT) sensor
  9. Compression pressure
  10. Valve clearance
  11. Valve timing
  12. PCV valve and hose
  13. PCV hose connections
  14. Air induction system
  15. HV control ECU
 Come on DTC stored
P0306  Cylinder 6 Misfire Detected
  1. Open or short in engine wire harness
  2. Connector connection
  3. Vacuum hose connections
  4. Ignition system
  5. Injector
  6. Fuel pressure
  7. Mass Air Flow (MAF) meter
  8. Engine Coolant Temperature (ECT) sensor
  9. Compression pressure
  10. Valve clearance
  11. Valve timing
  12. PCV valve and hose
  13. PCV hose connections
  14. Air induction system
  15. HV control ECU
 Come on DTC stored
P0327  Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)
  1. Short in knock sensor 1 circuit
  2. Knock sensor 1
  3. HV control ECU
 Come on DTC stored
P0328  Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)
  1. Open in knock sensor 1 circuit
  2. Knock sensor 1
  3. HV control ECU
 Come on DTC stored
P0332  Knock Sensor 2 Circuit Low Input (Bank 2)
  1. Short in knock sensor 2 circuit
  2. Knock sensor 2
  3. HV control ECU
 Come on DTC stored
P0333  Knock Sensor 2 Circuit High Input (Bank 2)
  1. Open in knock sensor 2 circuit
  2. Knock sensor 2
  3. HV control ECU
 Come on DTC stored
P0335  Crankshaft Position Sensor "A" Circuit
  1. Open or short in CKP sensor circuit
  2. CKP sensor
  3. CKP sensor plate
  4. HV control ECU
 Come on DTC stored
P0340  Camshaft Position Sensor Circuit Malfunction
  1. Open or short in VVT sensor
  2. VVT sensor
  3. Camshaft timing gear
  4. Jumped tooth of timing belt
  5. HV control ECU
 Come on DTC stored
P0341  Camshaft Position Sensor "A" Circuit Range / Performance (Bank 1 or Single Sensor)
  1. Open or short in VVT sensor
  2. VVT sensor
  3. Camshaft timing gear
  4. Jumped tooth of timing belt
  5. HV control ECU
 Come on DTC stored
P0345  Camshaft Position Sensor "A" Circuit (Bank 2)
  1. Open or short in VVT sensor
  2. VVT sensor
  3. Camshaft timing gear
  4. Jumped tooth of timing belt
  5. HV control ECU
 Come on DTC stored
P0346  Camshaft Position Sensor "A" Circuit Range / Performance (Bank 2)
  1. Open or short in VVT sensor
  2. VVT sensor
  3. Camshaft timing gear
  4. Jumped tooth of timing belt
  5. HV control ECU
 Come on DTC stored
P0351  Ignition Coil "A" Primary / Secondary Circuit
  1. Ignition system
  2. Open or short in IGF and IGT1 circuit between ignition coil and HV control ECU
  3. No. 1 ignition coil
  4. HV control ECU
 Come on DTC stored
P0352  Ignition Coil "B" Primary / Secondary Circuit
  1. Ignition system
  2. Open or short in IGF and IGT2 circuit between ignition coil and HV control ECU
  3. No. 2 ignition coil
  4. HV control ECU
 Come on DTC stored
P0353  Ignition Coil "C" Primary / Secondary Circuit
  1. Ignition system
  2. Open or short in IGF and IGT3 circuit between ignition coil and HV control ECU
  3. No. 3 ignition coil
  4. HV control ECU
 Come on DTC stored
P0354  Ignition Coil "D" Primary / Secondary Circuit
  1. Ignition system
  2. Open or short in IGF and IGT4 circuit between ignition coil and HV control ECU
  3. No. 4 ignition coil
  4. HV control ECU
 Come on DTC stored
P0355  Ignition Coil "E" Primary / Secondary Circuit
  1. Ignition system
  2. Open or short in IGF and IGT5 circuit between ignition coil and HV control ECU
  3. No. 5 ignition coil
  4. HV control ECU
 Come on DTC stored
P0356  Ignition Coil "F" Primary / Secondary Circuit
  1. Ignition system
  2. Open or short in IGF and IGT6 circuit between ignition coil and HV control ECU
  3. No. 6 ignition coil
  4. HV control ECU
 Come on DTC stored
P0420  Catalyst System Efficiency Below Threshold (Bank 1)
  1. Gas leakage from exhaust system
  2. A/F sensor (bank 1 sensor 1)
  3. HO2 sensor (bank 1 sensor 2)
  4. Exhaust manifold sub-assembly (TWC)
  5. Center exhaust pipe assembly
 Come on DTC stored
P0430  Catalyst System Efficiency Below Threshold (Bank 2)
  1. Gas leakage from exhaust system
  2. A/F sensor (bank 2 sensor 1)
  3. HO2 sensor (bank 2 sensor 2)
  4. No. 2 exhaust manifold converter sub-assembly
  5. Center exhaust pipe assembly
 Come on DTC stored
P043E  Evaporative Emission System Reference Orifice Clog Up
  1. Pump module (0.02 inch orifice, vacuum pump, vent valve)
  2. Connector/wire harness (Pump module - HV control ECU
  3. HV control ECU
 Come on DTC stored
P043F  Evaporative Emission System Reference Orifice High Flow
  1. Pump module (0.02 inch orifice, vacuum pump, vent valve)
  2. Connector/wire harness (Pump module - HV control ECU
  3. HV control ECU
 Come on DTC stored
P0441  Evaporative Emission Control System Incorrect Purge Flow
  1. EVAP VSV
  2. Connector/wire harness (EVAP VSV - HV control ECU)
  3. HV control ECU
  4. Pump module
  5. Leakage from EVAP system
  6. Leakage from EVAP line (EVAP VSV - Intake manifold)
 Come on DTC stored
P0450  Evaporative Emission Control System Pressure Sensor / Switch
  1. Pump module
  2. HV control ECU
 Come on DTC stored
P0451  Evaporative Emission Control System Pressure Sensor Range / Performance
  1. Pump module
  2. Connector/wire harness (Pump module - HV control ECU)
  3. HV control ECU
 Come on DTC stored
P0452  Evaporative Emission Control System Pressure Sensor / Switch Low Input
  1. Pump module
  2. Connector/wire harness (Pump module - HV control ECU)
  3. HV control ECU
 Come on DTC stored
P0453  Evaporative Emission Control System Pressure Sensor / Switch High Input
  1. Pump module
  2. Connector/wire harness (Pump module - HV control ECU)
  3. HV control ECU
 Come on DTC stored
P0505  Idle Control System Malfunction
  1. ETCS
  2. Air induction system
  3. PCV hose connection
  4. HV control ECU
 Come on DTC stored
P050A  Cold Start Idle Air Control System Performance
  1. Throttle body assembly
  2. Mass airflow meter
  3. Air induction system
  4. PCV hose connections
  5. VVT system
  6. Air cleaner filter element
  7. Hybrid vehicle control ECU
 Come on DTC stored
P0560  System Voltage
  1. Open in back-up power source circuit
  2. EFI fuse
  3. HV control ECU
 Come on DTC stored
P0604  Internal Control Module Random Access Memory (RAM) Error HV control ECU Come on DTC stored
P0606  ECM/PCM Processor
  1. Exhaust gas leak
  2. HO2 sensor
  3. HV control ECU
 Come on DTC stored
P0607  Control Module Performance HV control ECU Come on DTC stored
P0657  Actuator Supply Voltage Circuit / Open HV control ECU Come on DTC stored
P1420  Evaporative Emission Canister Small Leak
  1. Leakage from EVAP line (Canister - Fuel vapor-containment valve)
  2. Leakage from EVAP line (Purge VSV - Canister)
  3. Pump module
  4. Leakage from canister
 Come on DTC stored
P1421  Evaporative Emission Canister Gross Leak
  1. Leakage from EVAP line (Canister - Fuel vapor-containment valve)
  2. Leakage from EVAP line (Purge VSV - Canister)
  3. Pump module
  4. Leakage from canister
 Come on DTC stored
P1422  Fuel Tank Small Leak
  1. Leakage from EVAP line (Canister - Fuel vapor-containment valve)
  2. Leakage from EVAP line (Purge VSV - Canister)
  3. Pump module
  4. Leakage from canister
 Come on DTC stored
P1423  Fuel Tank Gross Leak
  1. Leakage from EVAP line (Canister - Fuel vapor-containment valve)
  2. Leakage from EVAP line (Purge VSV - Canister)
  3. Pump module
  4. Leakage from canister
 Come on DTC stored
P1451  Fuel Tank Pressure Sensor Range/ Performance
  1. Fuel tank pressure sensor
  2. Connector/wire harness (Fuel tank pressure sensor - HV control ECU)
  3. HV control ECU
 Come on DTC stored
P1452  Fuel Tank Pressure Sensor Low Input
  1. Fuel tank pressure sensor
  2. Connector/wire harness (Fuel tank pressure sensor - HV control ECU)
  3. HV control ECU
 Come on DTC stored
P1453  Fuel Tank Pressure Sensor High Input
  1. Fuel tank pressure sensor
  2. Connector/wire harness (Fuel tank pressure sensor - HV control ECU)
  3. HV control ECU
 Come on DTC stored
P2102  Throttle Actuator Control Motor Circuit Low
  1. Open in throttle actuator circuit
  2. Throttle actuator
  3. HV control ECU
 Come on DTC stored
P2103  Throttle Actuator Control Motor Circuit High
  1. Short in throttle actuator circuit
  2. Throttle actuator
  3. Throttle valve
  4. Throttle body assembly
  5. HV control ECU
 Come on DTC stored
P2111  Throttle Actuator Control System - Stuck Open
  1. Throttle actuator
  2. Throttle body
  3. Throttle valve
 Come on DTC stored
P2112  Throttle Actuator Control System - Stuck Closed
  1. Throttle actuator
  2. Throttle body
  3. Throttle valve
 Come on DTC stored
P2118  Throttle Actuator Control Motor Current Range / Performance
  1. Open in ETCS power source circuit
  2. ETCS fuse
  3. HV control ECU
 Come on DTC stored
P2119  Throttle Actuator Control Throttle Body Range / Performance
  1. ETCS
  2. HV control ECU
 Come on DTC stored
P2135  Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation
  1. Short between VTA and VTA2 circuits
  2. TP sensor (built into throttle body)
  3. HV control ECU
 Come on DTC stored
P2195  Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1)
  1. Open or short in A/F sensor (bank 1 sensor 1) circuit
  2. A/F sensor (bank 1 sensor 1)
  3. A/F sensor (bank 1 sensor 1) heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. Air induction system
  7. Fuel pressure
  8. Injector
  9. HV control ECU
 Come on DTC stored
P2196  Oxygen (A/F) Sensor Signal Stuck Rich (Bank 1 Sensor 1)
  1. Open or short in A/F sensor (bank 1 sensor 1) circuit
  2. A/F sensor (bank 1 sensor 1)
  3. A/F sensor (bank 1 sensor 1) heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. Air induction system
  7. Fuel pressure
  8. Injector
  9. HV control ECU
 Come on DTC stored
P2197  Oxygen (A/F) Sensor Signal Stuck Lean (Bank 2 Sensor 1)
  1. Open or short in A/F sensor (bank 2 sensor 1) circuit
  2. A/F sensor (bank 2 sensor 1)
  3. A/F sensor (bank 2 sensor 1) heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. Air induction system
  7. Fuel pressure
  8. Injector
  9. HV control ECU
 Come on DTC stored
P2198  Oxygen (A/F) Sensor Signal Stuck Rich (Bank 2 Sensor 1)
  1. Open or short in A/F sensor (bank 2 sensor 1) circuit
  2. A/F sensor (bank 2 sensor 1)
  3. A/F sensor (bank 2 sensor 1) heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. Air induction system
  7. Fuel pressure
  8. Injector
  9. HV control ECU
 Come on DTC stored
P2237  Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1)
  1. Open or short in A/F sensor (bank 1 sensor 1) circuit
  2. A/F sensor (bank 1 sensor 1)
  3. A/F sensor heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. HV control ECU
 Come on DTC stored
P2238  Oxygen (A/F) Sensor Pumping Current Circuit Low (Bank 1 Sensor 1)
  1. Open or short in A/F sensor (bank 1 sensor 1) circuit
  2. A/F sensor (bank 1 sensor 1)
  3. A/F sensor heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. HV control ECU
 Come on DTC stored
P2239  Oxygen (A/F) Sensor Pumping Current Circuit High (Bank 1 Sensor 1)
  1. Open or short in A/F sensor (bank 1 sensor 1) circuit
  2. A/F sensor (bank 1 sensor 1)
  3. A/F sensor heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. HV control ECU
 Come on DTC stored
P2240  Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 2 Sensor 1)
  1. Open or short in A/F sensor (bank 2 sensor 1) circuit
  2. A/F sensor (bank 2 sensor 1)
  3. A/F sensor heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. HV control ECU
 Come on DTC stored
P2241  Oxygen (A/F) Sensor Pumping Current Circuit Low (Bank 2 Sensor 1)
  1. Open or short in A/F sensor (bank 2 sensor 1) circuit
  2. A/F sensor (bank 2 sensor 1)
  3. A/F sensor heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. HV control ECU
 Come on DTC stored
P2242  Oxygen (A/F) Sensor Pumping Current Circuit High (Bank 2 Sensor 1)
  1. Open or short in A/F sensor (bank 2 sensor 1) circuit
  2. A/F sensor (bank 2 sensor 1)
  3. A/F sensor heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. HV control ECU
 Come on DTC stored
P2252  Oxygen (A/F) Sensor Reference Ground Circuit Low (Bank 1 Sensor 1)
  1. Open or short in A/F sensor (bank 1 sensor 1) circuit
  2. A/F sensor (bank 1 sensor 1)
  3. A/F sensor heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. HV control ECU
 Come on DTC stored
P2253  Oxygen (A/F) Sensor Reference Ground Circuit High (Bank 1 Sensor 1)
  1. Open or short in A/F sensor (bank 1 sensor 1) circuit
  2. A/F sensor (bank 1 sensor 1)
  3. A/F sensor heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. HV control ECU
 Come on DTC stored
P2255  Oxygen (A/F) Sensor Reference Ground Circuit Low (Bank 2 Sensor 1)
  1. Open or short in A/F sensor (bank 2 sensor 1) circuit
  2. A/F sensor (bank 2 sensor 1)
  3. A/F sensor heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. HV control ECU
 Come on DTC stored
P2256  Oxygen (A/F) Sensor Reference Ground Circuit High (Bank 2 Sensor 1)
  1. Open or short in A/F sensor (bank 2 sensor 1) circuit
  2. A/F sensor (bank 2 sensor 1)
  3. A/F sensor heater
  4. A/F relay
  5. A/F sensor heater and relay circuits
  6. HV control ECU
 Come on DTC stored
P2401  Evaporative Emission System Leak Detection Pump Control Circuit Low
  1. Pump module (0.02 inch orifice, vacuum pump, vent valve)
  2. Connector/wire harness (Pump module - HV control ECU)
  3. HV control ECU
 Come on DTC stored
P2402  Evaporative Emission System Leak Detection Pump Control Circuit High
  1. Pump module (0.02 inch orifice, vacuum pump, vent valve)
  2. Connector/wire harness (Pump module - HV control ECU)
  3. HV control ECU
 Come on DTC stored
P2419  Evaporative Emission System Switching Valve Control Circuit Low
  1. Pump module (0.02 inch orifice, vacuum pump, vent valve)
  2. Connector/wire harness (Pump module - HV control ECU)
  3. HV control ECU
 Come on DTC stored
P2420  Evaporative Emission System Switching Valve Control Circuit High
  1. Pump module (0.02 inch orifice, vacuum pump, vent valve)
  2. Connector/wire harness (Pump module - HV control ECU)
  3. HV control ECU
 Come on DTC stored
P2450  Fuel Vapor-containment Valve Stuck Open
  1. Fuel vapor-containment valve
  2. Connector/wire harness (fuel vapor-containment valve - HV control ECU)
  3. HV control ECU
 Come on DTC stored
P2451  Fuel Vapor-containment Valve Stuck Close
  1. Fuel vapor-containment valve
  2. Connector/wire harness (fuel vapor-containment valve - HV control ECU)
  3. HV control ECU
 Come on DTC stored
P2610  ECM / PCM Internal Engine Off Timer Performance HV control ECU Come on DTC stored
P2A00  A/F Sensor Circuit Slow Response (Bank 1 Sensor 1)
  1. Open or short in A/F sensor (bank 1 sensor 1)
  2. A/F sensor (bank 1 sensor 1)
  3. A/F sensor heater
  4. A/F relay
  5. Open or short in A/F sensor heater and relay circuits
  6. Air induction system
  7. Fuel pressure
  8. Injector
  9. PCV valve and hose
  10. PCV hose connection
  11. HV control ECU
 Come on DTC stored
P2A03  A/F Sensor Circuit Slow Response (Bank 2 Sensor 1)
  1. Open or short in A/F sensor (bank 2 sensor 1)
  2. A/F sensor (bank 2 sensor 1)
  3. A/F sensor heater
  4. A/F relay
  5. Open or short in A/F sensor heater and relay circuits
  6. Air induction system
  7. Fuel pressure
  8. Injector
  9. PCV valve and hose
  10. PCV hose connection
  11. HV control ECU
 Come on DTC stored
P3190  Poor Engine Power
  1. Air induction system
  2. Throttle body
  3. Fuel pressure
  4. Engine
  5. Mass airflow meter
  6. Out of fuel
  7. Engine coolant temperature sensor
  8. Crankshaft position sensor
  9. Camshaft position sensor
  10. HV control ECU
 Come on DTC stored
P3191  Engine does not Start
  1. Air induction system
  2. Throttle body
  3. Fuel pressure
  4. Engine
  5. Mass air flow meter
  6. Out of fuel
  7. Engine coolant temperature sensor
  8. Crankshaft position sensor
  9. Camshaft position sensor
  10. HV control ECU
 Come on DTC stored
P3193  Fuel Run Out
  1. Out of fuel
  2. HV control ECU
 Come on DTC stored
U0001  High Speed CAN Communication Circuit HV control ECU Come on DTC stored
U0293  Lost Communication with HV ECU
  1. Wire harness
  2. HV control ECU
 Come on DTC stored
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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