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 MANUALSMERCURY2011MARINER PREMIER, 2.5 7, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXSTARTING SYSTEM DTCSPCM
2011 Mercury Mariner Premier, 2.5 7, AWD
Starting System DTCS: Pcm
2011 Mercury Mariner Premier, 2.5 7, AWDSECTION Pcm
PCM DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Action |
|---|---|---|
| P0512 | Starter Request Circuit - Circuit has Power With the Ignition in the OFF Position | CARRY OUT the Ignition Switch Component Test. Refer to IGNITION SWITCH (14489) article, Escape/Mariner or IGNITION SWITCH (14489) article, Escape Hybrid/Mariner Hybrid for component testing. If necessary, INSTALL a new ignition switch. If the ignition switch passed the component test, REPAIR circuit CDC35 (BU/WH) for a short to power. |
| P0706 | TR sensor A circuit range/performance | Refer to the appropriate Automatic Transmission article for the procedure. |
| P0707 | TR sensor A circuit low | Refer to the appropriate Automatic Transmission article for the procedure. |
| P0708 | TR sensor A circuit high | Refer to the appropriate Automatic Transmission article for the procedure. |
| P1260 | Theft detected, vehicle immobilized | Refer to the DTC Chart in ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) - HYBRID article. |
| P1702 | TR sensor A circuit failure | Refer to the appropriate Automatic Transmission article for the procedure. |
| P1705 | TR Not indicating PARK/NEUTRAL during Self-Test | Refer to the appropriate Automatic Transmission article for the procedure. |
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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.