Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2006 Lexus GS 430FACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Chart
HINT:
Parameters listed in the chart may not be exactly the same as your readings due to the type of instrument or other factors. If a DTC is displayed, check the trouble area for the DTC listed in the table below. For details of each DTC.
DIAGNOSTIC TROUBLE CODE CHART
| DTC No. | Detection Item | Trouble Area | MIL | Memory |
|---|---|---|---|---|
| P0010 | Camshaft Position "A" Actuator Circuit (Bank 1) |
|
Comes on | DTC stored |
| P0011 | Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1) |
|
Comes on | DTC stored |
| P0012 | Camshaft Position "A" - Timing Over-Retarded (Bank 1) |
|
Comes on | DTC stored |
| P0016 | Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A) |
|
Comes on | DTC stored |
| P0018 | Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A) |
|
Comes on | DTC stored |
| P0020 | Camshaft Position "A" Actuator Circuit (Bank 2) |
|
Comes on | DTC stored |
| P0021 | Camshaft Position "A" - Timing Over- Advanced or System Performance (Bank 2) |
|
Comes on | DTC stored |
| P0022 | Camshaft Position "A" - Timing Over-Retarded (Bank 2) |
|
Comes on | DTC stored |
| P0031 | Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 1) |
|
Comes on | DTC stored |
| P0032 | Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 1) |
|
Comes on | DTC stored |
| P0037 | Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2) |
|
Comes on | DTC stored |
| P0038 | Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 2) |
|
Comes on | DTC stored |
| P0051 | Oxygen Sensor Heater Control Circuit Low (Bank 2 Sensor 1) |
|
Comes on | DTC stored |
| P0052 | Oxygen Sensor Heater Control Circuit High (Bank 2 Sensor 1) |
|
Comes on | DTC stored |
| P0057 | Oxygen Sensor Heater Control Circuit Low (Bank 2 Sensor 2) |
|
Comes on | DTC stored |
| P0058 | Oxygen Sensor Heater Control Circuit High (Bank 2 Sensor 2) |
|
Comes on | DTC stored |
| P0100 | Mass Air Flow Circuit Malfunction |
|
Comes on | DTC stored |
| P0101 | Mass Air Flow Circuit Range / Performance Problem |
|
Comes on | DTC stored |
| P0102 | Mass Air Flow Circuit Low |
|
Comes on | DTC stored |
| P0103 | Mass Air Flow Circuit High |
|
Comes on | DTC stored |
| P0110 | Intake Air Temperature Circuit |
|
Comes on | DTC stored |
| P0112 | Intake Air Temperature Circuit Low Input |
|
Comes on | DTC stored |
| P0113 | Intake Air Temperature Circuit High Input |
|
Comes on | DTC stored |
| P0115 | Engine Coolant Temperature Circuit |
|
Comes on | DTC stored |
| P0116 | Engine Coolant Temperature Circuit Range / Performance Problem |
|
Comes on | DTC stored |
| P0117 | Engine Coolant Temperature Circuit Low Input |
|
Comes on | DTC stored |
| P0118 | Engine Coolant Temperature Circuit High Input |
|
Comes on | DTC stored |
| P0120 | Throttle / Pedal Position Sensor / Switch "A" Circuit |
|
Comes on | DTC stored |
| P0121 | Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem |
|
Comes on | DTC stored |
| P0122 | Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input |
|
Comes on | DTC stored |
| P0123 | Throttle / Pedal Position Sensor / Switch "A" Circuit High Input |
|
Comes on | DTC stored |
| P0125 | Insufficient Coolant Temperature for Closed Loop Fuel Control |
|
Comes on | DTC stored |
| P0128 | Thermostat Malfunction |
|
Comes on | DTC stored |
| P0130 | Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 1) |
|
Comes on | DTC stored |
| P0133 | Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 1) |
|
Comes on | DTC stored |
| P0134 | Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1) |
|
Comes on | DTC stored |
| P0136 | Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2) |
|
Comes on | DTC stored |
| P0138 | Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2) |
|
Comes on | DTC stored |
| P0139 | Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2) |
|
Comes on | DTC stored |
| P0150 | Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 1) |
|
Comes on | DTC stored |
| P0153 | Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 1) |
|
Comes on | DTC stored |
| P0154 | Oxygen Sensor Circuit No Activity Detected (Bank 2 Sensor 1) |
|
Comes on | DTC stored |
| P0156 | Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2) |
|
Comes on | DTC stored |
| P0158 | Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2) |
|
Comes on | DTC stored |
| P0159 | Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2) |
|
Comes on | DTC stored |
| P0171 | System Too Lean (Bank 1) |
|
Comes on | DTC stored |
| P0172 | System Too Rich (Bank 1) |
|
Comes on | DTC stored |
| P0174 | System Too Lean (Bank 2) |
|
Comes on | DTC stored |
| P0175 | System Too Rich (Bank 2) |
|
Comes on | DTC stored |
| P0220 | Throttle / Pedal Position Sensor / Switch "B" Circuit |
|
Comes on | DTC stored |
| P0222 | Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input |
|
Comes on | DTC stored |
| P0223 | Throttle / Pedal Position Sensor / Switch "B" Circuit High Input |
|
Comes on | DTC stored |
| P0230 | Fuel Pump Primary Circuit |
|
- | DTC stored |
| P0300 | Random / Multiple Cylinder Misfire Detected |
|
Comes on | DTC stored |
| P0301 | Cylinder 1 Misfire Detected |
|
Blink | DTC stored |
| P0302 | Cylinder 2 Misfire Detected |
|
Blink | DTC stored |
| P0303 | Cylinder 3 Misfire Detected |
|
Blink | DTC stored |
| P0304 | Cylinder 4 Misfire Detected |
|
Blink | DTC stored |
| P0305 | Cylinder 5 Misfire Detected |
|
Blink | DTC stored |
| P0306 | Cylinder 6 Misfire Detected |
|
Blink | DTC stored |
| P0307 | Cylinder 7 Misfire Detected |
|
Blink | DTC stored |
| P0308 | Cylinder 8 Misfire Detected |
|
Blink | DTC stored |
| P0327 | Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor) |
|
Comes on | DTC stored |
| P0328 | Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor) |
|
Comes on | DTC stored |
| P0332 | Knock Sensor 2 Circuit Low Input (Bank 2) |
|
Comes on | DTC stored |
| P0333 | Knock Sensor 2 Circuit High Input (Bank 2) |
|
Comes on | DTC stored |
| P0335 | Crankshaft Position Sensor "A" Circuit |
|
Comes on | DTC stored |
| P0339 | Crankshaft Position Sensor "A" Circuit Intermittent |
|
- | DTC stored |
| P0340 | Camshaft Position Sensor Circuit Malfunction |
|
Comes on | DTC stored |
| P0341 | Camshaft Position Sensor "A" Circuit Range / Performance (Bank 1 or Single Sensor) |
|
Comes on | DTC stored |
| P0345 | Camshaft Position Sensor "A" Circuit (Bank 2) |
|
Comes on | DTC stored |
| P0346 | Camshaft Position Sensor "A" Circuit Range / Performance (Bank 2) |
|
Comes on | DTC stored |
| P0351 | Ignition Coil "A" Primary / Secondary Circuit |
|
Comes on | DTC stored |
| P0352 | Ignition Coil "B" Primary / Secondary Circuit |
|
Comes on | DTC stored |
| P0353 | Ignition Coil "C" Primary / Secondary Circuit |
|
Comes on | DTC stored |
| P0354 | Ignition Coil "D" Primary / Secondary Circuit |
|
Comes on | DTC stored |
| P0355 | Ignition Coil "E" Primary / Secondary Circuit |
|
Comes on | DTC stored |
| P0356 | Ignition Coil "F" Primary / Secondary Circuit |
|
Comes on | DTC stored |
| P0357 | Ignition Coil "G" Primary / Secondary Circuit |
|
Comes on | DTC stored |
| P0358 | Ignition Coil "H" Primary / Secondary Circuit |
|
Comes on | DTC stored |
| P0420 | Catalyst System Efficiency Below Threshold (Bank 1) |
|
Comes on | DTC stored |
| P0430 | Catalyst System Efficiency Below Threshold (Bank 2) |
|
Comes on | DTC stored |
| P043E | Evaporative Emission System Leak Detection Reference Orifice Low Flow |
|
Comes on | DTC stored |
| P043F | Evaporative Emission System Reference Orifice High Flow |
|
Comes on | DTC stored |
| P0441 | Evaporative Emission Control System Incorrect Purge Flow |
|
Comes on | DTC stored |
| P0450 | Evaporative Emission Control System Pressure Sensor Malfunction |
|
Comes on | DTC stored |
| P0451 | Evaporative Emission Control System Pressure Sensor Range / Performance |
|
Comes on | DTC stored |
| P0452 | Evaporative Emission Control System Pressure Sensor / Switch Low Input |
|
Comes on | DTC stored |
| P0453 | Evaporative Emission Control System Pressure Sensor / Switch High Input |
|
Comes on | DTC stored |
| P0455 | Evaporative Emission Control System Leak Detected (Gross Leak) |
|
Comes on | DTC stored |
| P0456 | Evaporative Emission Control System Leak Detected (Very Small Leak) |
|
Comes on | DTC stored |
| P0504 | Brake Switch "A" / "B" Correlation |
|
- | DTC stored |
| P0505 | Idle Control System Malfunction |
|
Comes on | DTC stored |
| P0560 | System Voltage |
|
Comes on | DTC stored |
| P0571 | Brake Switch "A" Circuit |
|
Comes on | DTC stored |
| P0604 | Internal Control Module Random Access Memory (RAM) Error |
|
Comes on | DTC stored |
| P0606 | ECM / PCM Processor |
|
Comes on | DTC stored |
| P0607 | Control Module Performance |
|
Comes on | DTC stored |
| P0617 | Starter Relay Circuit High |
|
Comes on | DTC stored |
| P0630 | Vin not Programmed or Mismatch - ECM / PCM |
|
Comes on | DTC stored |
| P0657 | Actuator Supply Voltage Circuit / Open |
|
Comes on | DTC stored |
| P1340 | Camshaft Position Sensor "A" (Bank 1 Sensor 2) |
|
Comes on | DTC stored |
| P1341 | Camshaft Position Sensor "A" (Bank 1 Sensor 2 ) |
|
Comes on | DTC stored |
| P2102 | Throttle Actuator Control Motor Circuit Low |
|
Comes on | DTC stored |
| P2103 | Throttle Actuator Control Motor Circuit High |
|
Comes on | DTC stored |
| P2111 | Throttle Actuator Control System - Stuck Open |
|
Comes on | DTC stored |
| P2112 | Throttle Actuator Control System - Stuck Closed |
|
Comes on | DTC stored |
| P2118 | Throttle Actuator Control Motor Current Range / Performance |
|
Comes on | DTC stored |
| P2119 | Throttle Actuator Control Throttle Body Range / Performance |
|
Comes on | DTC stored |
| P2120 | Throttle / Pedal Position Sensor / Switch "D" Circuit |
|
Comes on | DTC stored |
| P2121 | Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance |
|
Comes on | DTC stored |
| P2122 | Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input |
|
Comes on | DTC stored |
| P2123 | Throttle / Pedal Position Sensor / Switch "D" Circuit High Input |
|
Comes on | DTC stored |
| P2125 | Throttle / Pedal Position Sensor / Switch "E" Circuit |
|
Comes on | DTC stored |
| P2127 | Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input |
|
Comes on | DTC stored |
| P2128 | Throttle / Pedal Position Sensor / Switch "E" Circuit High Input |
|
Comes on | DTC stored |
| P2135 | Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation |
|
Comes on | DTC stored |
| P2138 | Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation |
|
Comes on | DTC stored |
| P2195 | Oxygen Sensor Signal Stuck Lean (Bank 1 Sensor 1) |
|
Comes on | DTC stored |
| P2196 | Oxygen Sensor Signal Stuck Rich (Bank 1 Sensor 1) |
|
Comes on | DTC stored |
| P2197 | Oxygen Sensor Signal Stuck Lean (Bank 2 Sensor 1) |
|
Comes on | DTC stored |
| P2198 | Oxygen Sensor Signal Stuck Rich (Bank 2 Sensor 1) |
|
Comes on | DTC stored |
| P2401 | Evaporative Emission Leak Detection Pump Stuck OFF |
|
Comes on | DTC stored |
| P2402 | Evaporative Emission Leak Detection Pump Stuck ON |
|
Comes on | DTC stored |
| P2419 | Evaporative Emission Pressure Switching Valve Stuck ON |
|
Comes on | DTC stored |
| P2420 | Evaporative Emission Pressure Switching Valve Stuck OFF |
|
Comes on | DTC stored |
| P2610 | ECM / PCM Internal Engine Off Timer Performance |
|
Comes on | DTC stored |
| U0001 | High Speed CAN Communication Bus |
|
Comes 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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