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Diagnostic Trouble Code (DTC) Information



ECM-P064100 Sensor Reference Voltage A Open Circuit

Condition







Engine control module motor (ECM) checks the internal end-stage for 5 volt feed. If voltage becomes too high or too low, the diagnostic trouble code is generated.

The diagnostic trouble code can be diagnosed when the ignition is on.

Substitute Value
- Nothing

Possible Source
- Signal cable for connected component short-circuited to voltage
- Open circuit on signal cable for connected component.
- Signal cable for connected component short-circuited to ground.
- Damaged engine control module (ECM).

Fault Symptom[s]
- Uneven idle.
- Increased emissions.
- Poor performance.
- Engine stops while driving.