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.
PCM DTC Chart
2009 Lincoln Navigator L RWDSECTION PCM DTC Chart
PCM DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Action to Take |
|---|---|---|
| P0532 | A/C Refrigerant Pressure Sensor A Circuit Low | Go To PINPOINT TEST A . |
| P0533 | A/C Refrigerant Pressure Sensor A Circuit High | Go To PINPOINT TEST A . |
| P0645 | A/C Clutch Relay Control Circuit | Go To PINPOINT TEST B . |
| P1464 | A/C Demand Out Of Self Test Range | If the HVAC selector was not in the OFF position, place it in the OFF position, CLEAR the DTCs and REPEAT the self-test. If the DTC does not return, ignore the DTC and continue diagnostics. If the DTC returns, Go To PINPOINT TEST M . |
| All Other DTCs | - | REFER to INTRODUCTION - GASOLINE MODELS article. |
RENDER: 1.0x
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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.