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 Lexus GX 470FACTORY OEM SERVICE PROCEDURE
Engine Performance DTCS
ENGINE PERFORMANCE DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| DTC P0010, P0020 | CAMSHAFT POSITION "A" ACTUATOR CIRCUIT (BANK 1)/(BANK 2) |
| DTC P0011, P0012, P0021, P0022 | CAMSHAFT POSITION "A" -TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE/RETARDED (BANK 1)/(BANK2) |
| DTC P0016, P0018 | CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELATION (BANK 1 SENSOR A)/(BANK 2 SENSOR A) |
| DTC P0031, P0032, P0051, P0052 | OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT LOW/HIGH (BANK 1 SENSOR 1)/(BANK 2 SENSOR 1) |
| DTC P0037, P0038, P0057, P0058 | OXYGEN SENSOR HEATER CONTROL CIRCUIT /(BANK 1 SENSOR 2)/(BANK 2 SENSOR 2) |
| DTC P0100, P0102, P0103 | MASS OR VOLUME AIR FLOW CIRCUIT, 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, INTAKE AIR TEMPERATURE CIRCUIT LOW/HIGH INPUT |
| DTC P0115, P0117, P0118 | ENGINE COOLANT TEMPERATURE CIRCUIT, ENGINE COOLANT TEMPERATURE CIRCUIT LOW/HIGH INPUT |
| DTC P0116 | ENGINE COOLANT TEMPERATURE CIRCUIT RANGE/PERFORMANCE PROBLEM |
| DTC P0120, P0122, P0123, P0220, P0222, P0223, P2135 | THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT, THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT LOW/HIGH INPUT, THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT, THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT LOW/HIGH INPUT, THROTTLE/PEDAL POSITION SENSOR/SWITCH "A'V'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) |
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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