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.
2010 Mercury Mariner Premier, 2.5 7, FWDFACTORY OEM SERVICE PROCEDURE
DTC P1640: Powertrain DTCS Available In Another Module
DTC P1640: POWERTRAIN DTCS AVAILABLE IN ANOTHER MODULE
| Description: | Vehicles using a secondary engine control module can request that the powertrain control module (PCM) illuminate the malfunction indicator lamp (MIL) when a failure occurs which affects emissions. | ||
| Possible Causes: |
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| Diagnostic Aids: | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | Refer to the Description, Possible Causes and Diagnostic Aids for the appropriate DTC. | ||
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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