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.
2005 Toyota PriusFACTORY OEM SERVICE PROCEDURE
Engine Control System (SFI) - Diagnostics
- Precaution
- Definition Of Terms
- Part And System Name List
- Location
- System Diagram
- How To Proceed With Troubleshooting
- Customer Problem Analysis Check
- Check For Intermittent Problems
- Basic Inspection
- Registration
- List Of Disable A Monitor
- Checking Monitor Status
- Readiness Monitor Drive Pattern
- Problem Symptoms Table
- Terminals Of ECM
- Diagnosis System
- Diagnostic Trouble Codes Check/Clear
- Freeze Frame Data
- Check Mode Procedure
- Fail-Safe Chart
- Data List/Active Test
- Diagnostic Trouble Code Chart
- DTC P0010: Camshaft Position "A" Actuator Circuit (Bank 1)
- DTC P0011, P0012: Camshaft Position "A" -Timing Over-Advanced Or System Performance/Timing Over-Retarded (Bank 1)
- DTC P0016: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
- DTC P0031, P0032: Oxygen (A/F) Sensor Heater Control Circuit Low/High (Bank 1 Sensor 1)
- DTC P0037, P0038: Oxygen Sensor Heater Control Circuit Low/High (Bank 1 Sensor 2)
- DTC P0100, P0102, P0103: Mass Or Volume Air Flow Circuit Low/High Input
- DTC P0101: Mass Or Volume Air Flow Circuit Range/Performance Problem
- DTC P0110, P0112, P0113: Intake Air Temperature Circuit Low/High Input
- DTC P0115, P0117, P0118: Engine Coolant Temperature Circuit Low/High Input
- DTC P0116: Engine Coolant Temperature Circuit Range/Performance
- DTC P0120, P0122, P0123, P0220, P0222, P0223, P2135: Throttle/Pedal Position Sensor/Switch "A & B" Circuit Low/High Input & Throttle/Pedal Position Sensor/Switch "A & B" Voltage Correlation
- DTC P0121: Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance Problem
- DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control
- DTC P0128: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
- DTC P0136, P0137, P0138: Oxygen Sensor Circuit Malfunction Low/High Voltage (Bank 1 Sensor 2)
- Circuit Description
- Monitor Description
- Monitor Strategy
- Typical Enabling Conditions
- Typical Malfunction Thresholds
- Monitor Result (Mode 06 Data)
- Wiring Diagram
- Confirmation Driving Pattern For Diagnostic Trouble Codes P0136 & P0137
- Confirmation Driving Pattern For Diagnostic Trouble Code P0138
- Inspection Procedure
- DTC P0171, P0172: System Too Lean/Rich (Bank 1)
- DTC P0300, P0301, P0302, P0303, P0304: Random/Multiple Cylinder Misfire Detected & Cylinder 1-4 Misfire Detected
- DTC P0325, P0327, P0328: Knock Sensor 1 Circuit Low/High Input (Bank 1 Or Single Sensor)
- DTC P0335: Crankshaft Position Sensor "A" Circuit
- DTC P0340, P0341: Camshaft Position Sensor "A" Circuit Range/Performance (Bank 1 Or Single Sensor)
- DTC P0351, P0352, P0353, P0354: Ignition Coil "A-D" Primary/Secondary Circuit
- DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1)
- DTC P0441, P0446: Evaporative Emission Control System Incorrect Purge Flow/Vent Control Circuit
- DTC P0442, P0455, P0456: Evaporative Emission Control System Leak Detected (Small Leak/Gross Leak/Very Small Leak)
- DTC P0451, P0452, P0453: Evaporative Emission Control System Pressure Sensor/Switch Range/Performance Low/High Input
- DTC P0505: Idle Air Control System
- DTC P0560: System Voltage
- DTC P0604, P0606, P0607, P0657: Internal Control Module Random Access Memory (Ram) Error, ECM/Pcm Processor, Control Module Performance & Actuator Supply Voltage Circuit/Open
- DTC P0630: VIN Not Programmed Or Mismatch-ECM/Pcm
- DTC P1115, P1117, P1118: Coolant Temperature Sensor Circuit Low/High For Coolant Heat Storage System
- DTC P1116: Coolant Temperature Sensor Circuit Stack For Coolant Heat Storage System
- DTC P1120, P1122, P1123: Coolant Flow Control Valve Position Sensor Circuit Low/High
- DTC P1121: Coolant Flow Control Valve Position Sensor Circuit Stuck
- DTC P1150: Coolant Path Clog Up For Coolant Heat Storage System
- DTC P1151: Coolant Heat Storage Tank
- DTC P1455: Vapor Reducing Fuel Tank System Malfunction
- DTC P2102, P2103: Throttle Actuator Control Motor Circuit Low/High
- DTC P2111, P2112: Throttle Actuator Control System- Stuck Open/Closed
- DTC P2118: Throttle Actuator Control Motor Current Range/Performance
- DTC P2119: Throttle Actuator Control Throttle Body Range/Performance
- DTC P2195, P2196: Oxygen (A/F) Sensor Signal Stuck Lean/Rich (Bank 1 Sensor 1)
- DTC P2238, P2239, P2252, P2253: Oxygen Sensor Pumping Current Circuit Low/High (For A/F Sensor) (Bank 1 Sensor 1) & Oxygen Sensor Reference Ground Circuit Low/High (For A/F Sensor) (Bank 1 Sensor 1)
- DTC P2601: Coolant Pump Control Circuit Range/Performance
- DTC P2610: ECM/Pcm Internal Engine Off Timer Performance
- DTC P2A00: A/F Sensor Circuit Slow Response (Bank 1 Sensor 1)
- DTC P3190, P3191, P3193: Poor Engine Power, Engine Does Not Start & Fuel Run Out
- DTC U0293: Lost Communication With HV Ecu
- ECM Power Source Circuit
- Fuel Pump Control Circuit
- Mil Circuit
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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