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.
2003 Toyota Avalon XLSFACTORY OEM SERVICE PROCEDURE
Engine Performance DTCS
ENGINE PERFORMANCE DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| P0010 | Camshaft Position "A" Actuator Circuit (Bank No. 1) |
| P0011 | Camshaft Position "A" - Timing Over - Advanced Or System Performance (Bank No. 1) |
| P0012 | Camshaft Position "A" - Timing Over - Retarded (Bank No. 1) |
| P0016 | Crankshaft Position - Camshaft Position Correlation (Bank No. 1 Sensor "A") |
| P0018 | Crankshaft Position - Camshaft Position Correlation (Bank No. 2 Sensor "A") |
| P0020 | Camshaft Position "A" Actuator Circuit (Bank No. 2) |
| P0021 | Camshaft Position "A" - Timing Over - Advanced Or System Performance (Bank No. 2) |
| P0022 | Camshaft Position "A" - Timing Over - Retarded (Bank No. 2) |
| P0036 | Oxygen Sensor Heater Control Circuit (Bank No. 1 Sensor No. 2) |
| P0100 | Mass Or Air Flow Circuit |
| P0101 | Mass Or Volume Air Flow Circuit Range/Performance Problem |
| P0110 | Intake Air Temperature Circuit |
| P0115 | Engine Coolant Temperature Circuit |
| P0116 | Engine Coolant Temperature Circuit Range/Performance Problem |
| P0120 | Throttle/Pedal Position Sensor/Switch "A" Circuit |
| P0121 | Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance Problem |
| P0125 | Insufficient Coolant Temperature For Closed Loop Fuel Control |
| P0128 | Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) |
| P0134 | A/F Sensor Circuit No Activity Detected (Bank No. 1 Sensor No. 1) |
| P0135 | A/F Sensor Heater Circuit (Bank No. 1 Sensor No. 1) |
| P0136 | Oxygen Sensor Circuit Malfunction (Bank No. 1 Sensor No. 2) |
| P0154 | A/F Sensor Circuit No Activity Detected (Bank No. 2 Sensor No. 1) |
| P0155 | A/F Sensor Heater Circuit (Bank No. 2 Sensor No. 1) |
| P0171 | System Too Lean (Bank No. 1) |
| P0172 | System Too Rich (Bank No. 1) |
| P0174 | System Too Lean (Bank No. 2) |
| P0175 | System Too Rich (Bank No. 2) |
| P0300 | Random/Multiple Cylinder Misfire Detected |
| P0301 | Cylinder No. 1 Misfire Detected |
| P0302 | Cylinder No. 2 Misfire Detected |
| P0303 | Cylinder No. 3 Misfire Detected |
| P0304 | Cylinder No. 4 Misfire Detected |
| P0305 | Cylinder No. 5 Misfire Detected |
| P0306 | Cylinder No. 6 Misfire Detected |
| P0325 | Knock Sensor No. 1 Circuit (Bank No. 1 Or Single Sensor) |
| P0330 | Knock Sensor No. 2 Circuit (Bank No. 2) |
| P0335 | Crankshaft Position Sensor "A" Circuit |
| P0339 | Crankshaft Position Sensor Circuit Intermittent |
| P0340 | Camshaft Position Sensor "A" Circuit (Bank No. 1 Or Single Sensor) |
| P0341 | Camshaft Position Sensor "A" Circuit Range/Performance (Bank 1 Or Single Sensor) |
| P0345 | Camshaft Position Sensor "A" Circuit (Bank 2) |
| P0346 | Camshaft Position Sensor "A" Circuit Range/Performance (Bank 2) |
| P0351 | Ignition Coil "A" Primary/Secondary Circuit |
| P0352 | Ignition Coil "B" Primary/Secondary Circuit |
| P0353 | Ignition Coil "C" Primary/Secondary Circuit |
| P0354 | Ignition Coil "D" Primary/Secondary Circuit |
| P0355 | Ignition Coil "E" Primary/Secondary Circuit |
| P0356 | Ignition Coil "F" Primary/Secondary Circuit |
| P0420 | Catalyst System Efficiency Below Threshold (Bank No. 1) |
| P0441 | EVAP Incorrect Purge Flow |
| P0442 | EVAP Leak Detected (Small Leak) |
| P0446 | EVAP Vent Control Circuit |
| P0450 | EVAP Pressure Sensor/Switch |
| P0451 | EVAP Pressure Sensor/Switch Range/Performance |
| P0456 | EVAP Leak Detected (Very Small Leak) |
| P0500 | Vehicle Speed Sensor "A" |
| P0505 | Idle Air Control System |
| P0511 | Idle Air Control Circuit |
| P0560 | System Voltage |
| P0705 | Transmission Range Sensor Circuit Malfunction (PRNDL Input) |
| P0724 | Brake Switch "B" Circuit High |
| P0850 | Park/Neutral Switch Input Circuit |
| P2195 | A/F Sensor Circuit Range/Performance Lean Side (Bank No. 1 Sensor No. 1) |
| P2196 | A/F Sensor Circuit Range/Performance Rich Side (Bank No. 1 Sensor No. 1) |
| P2197 | A/F Sensor Circuit Range/Performance Lean Side (Bank No. 2 Sensor No. 1) |
| P2198 | A/F Sensor Circuit Range/Performance Rich Side (Bank No. 2 Sensor No. 1) |
| P2237 | A/F Sensor Circuit (Bank No. 1 Sensor No. 1) |
| P2240 | A/F Sensor Circuit (Bank No. 2 Sensor No. 1) |
| P2A00 | A/F Sensor Circuit Slow Response (Bank No. 1 Sensor No. 1) |
| P2A03 | A/F Sensor Circuit Slow Response (Bank No. 2 Sensor No. 1) |
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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