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.
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HOMESERVICE MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1281 (HVAC CLIMATE CONTROL SYSTEM - GENERAL INFORMATION & DIAGNOSTICS)DIAGNOSTIC TESTSCLIMATE CONTROL SYSTEMPCM DTC CHART
2009 Mercury Milan Premier, 3.0 1, AWD
PCM DTC Chart
2009 Mercury Milan Premier, 3.0 1, AWDSECTION PCM DTC Chart
WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
PCM DTC CHART
| DTC | Description | Action to Take |
|---|---|---|
| P0532 | A/C Pressure Refrigerant Sensor A Circuit Low | Go to Pinpoint Test a . |
| P0533 | A/C Refrigerant Pressure Sensor A Circuit High | Go to Pinpoint Test a . |
| P0645 | Air Conditioning Clutch Relay (A/CCR) 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 h . a |
| All Other DTCs | - | REFER to Introduction - Gasoline Engines . |
a PCM DTC P1464 will set if the function selector is in PANEL with A/C button pressed, DEFROST or MAX A/C mode when the on-demand self-test is being run.
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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.