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.
2004 Lexus LX 470FACTORY OEM SERVICE PROCEDURE
Engine Performance DTCS
ENGINE PERFORMANCE DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| P0031, P0032, P0037, P0038, P0051, P0052, P0057, P0058 | Oxygen Sensor Heater Control Circuit |
| P0100, P0102, P0103 | Mass Or Volume Air Flow Circuit |
| P0101 | Mass or Volume Air Flow Circuit Range/ Performance Problem |
| P0110, P0112, P0113 | Intake Air Temperature Circuit |
| P0115, P0117, P0118 | Engine Coolant Temperature Circuit |
| P0116 | Engine Coolant Temperature Circuit Range/ Performance Problem |
| P0120, P0122, P0123, P0220, P0222, P0223, P2135 | Throttle/Pedal Position Sensor/Switch |
| 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) |
| P0130, P0150, P2195, P2196, P2167, P2198 | Oxygen Sensor Circuit |
| P0133 | Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 1) |
| P0153 | Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 1) |
| P0134 | Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1) |
| P0154 | Oxygen Sensor Circuit No Activity Detected (Bank 2 Sensor 1) |
| P0136 | Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2) |
| P0156 | Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2) |
| P0171 | System too Lean (Bank 1) |
| P0172 | System too Rich (Bank 1) |
| P0174 | System too Lean (Bank 2) |
| P0175 | System too Rich (Bank 2) |
| P0230 | Fuel Pump Primary Circuit |
| P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 | Random/Multiple Cylinder Misfire Detected |
| P0325 | Knock Sensor 1 Circuit (Bank 1 or Single Sensor) |
| P0330 | Knock Sensor 2 Circuit (Bank 2) |
| P0335 | Crankshaft Position Sensor "A" Circuit, DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent |
| P0339 | Crankshaft Position Sensor "A" Circuit, DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent |
| P0340 | Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor), DTC P0341: Camshaft Position Sensor "A" Circuit Range/Performance (Single Sensor) |
| P0351, P0352, P0353, P0354, P0355, P0356, P0357, P0358 | Ignitor Coil Primary/Secondary Circuit |
| P0420 | Catalyst System Efficiency Below Threshold (Bank 1), DTC P0430: Catalyst System Efficiency Below Threshold (Bank 2) |
| P0441, P0446, P2418 | Evaporative Emission Control System |
| P0442, P0455, P0456 | Evaporative Emission Control System Leak Detected |
| P0451, P0452, P0453 | Evaporative Emission Control System Pressure Sensor/Switch |
| P0500 | Vehicle Speed Sensor, DTC P0503 Vehicle Speed Sensor "A" Intermittent/Erratic/High |
| P0504 | Brake Switch "A"/"B" Correlation |
| P0505 | Idle Air Control System |
| P0560 | System Voltage |
| P0604 | Internal Control Module Random Access Memory (RAM) Error |
| P0606 | ECM/PCM Processor |
| P0607 | Control Module Performance |
| P0657 | Actuator Supply Voltage Circuit/Open |
| P0617 | Starter Relay Circuit High |
| P2102 | Throttle Actuator Control Motor Circuit Low |
| P2103 | Throttle Actuator Control Motor Circuit High |
| P2111 | Throttle Actuator Control System - Stuck Open |
| P2112 | Throttle Actuator Control System - Stuck Closed |
| P2118 | Throttle Actuator Control Motor Current Range/Performance |
| P2119 | Throttle Actuator Control Throttle Body Range/Performance |
| P2120, P2122, P2123, P2125, P2127, P2128, P2138 | Throttle/Pedal Position Sensor/Switch |
| P2121 | Throttle/Pedal Position Sensor/Switch "D" Circuit Range/Performance |
Factory Service Tools
Use the Manual With the Right Hardware
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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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