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 GX 470FACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Chart
HINT:
Parameters listed in the chart may be different than your readings depending on the type of instrument used and other factors.
During the DTC check, refer to the table below if a malfunction code is displayed.
DIAGNOSTIC TROUBLE CODE CHART
| 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.