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 MANUALSVOLVO2010XC70 AWD L6-3.2L VIN 96 B6324S2REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONP CODE CHARTSP065CP065C00 (ENGINE CONTROL MODULE - ECM)DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION
2010 Volvo XC70 AWD L6-3.2L VIN 96 B6324S2
Diagnostic Trouble Code (DTC) Information
2010 Volvo XC70 AWD L6-3.2L VIN 96 B6324S2SECTION Diagnostic Trouble Code (DTC) Information
Diagnostic trouble code (DTC) information ECM-P065C00
Condition
The engine control module (ECM) regulates the alternator charge voltage (via LIN communication) on request of the central electronic module (CEM) (via CAN communication). The alternator control module (ACM) sends information on the fault to the engine control module (ECM) (via LIN communication). The diagnostic trouble code is generated if the alternator control module (ACM) sends the engine control module (ECM) information on a mechanical fault in the alternator (engine speed exceeds a certain value but the alternator is not operating).
The diagnostic trouble code can be diagnosed when the engine is running.
Substitute value
- The alternator control module (ACM) (charge regulator) charges with a fixed voltage of 13.8 V.
Possible source
- Damaged auxiliaries belt and belt tensioner.
- Damaged freewheel.
- Damaged alternator.
Fault symptom[s]
- Battery discharged.
- Low starter motor rpm.
- Noise from alternator.
- The engine judders under acceleration
RENDER: 1.0x
NO RELATED
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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.