P0657moderate severityPowertrain
Actuator Supply Voltage A Circuit / Open
on 1994-2007 Dodge Ram 2500 5.9L I6 Cummins Diesel · 4WD
What this code means
The PCM detected an open or fault in the actuator supply voltage A circuit. Actuators powered by this circuit may fail to operate.
Symptoms
- Multiple actuator codes
- Component not responding
- Check engine light on
Common causes
- Open in supply voltage circuit
- Damaged wiring or connector
- Blown fuse
- PCM internal fault
Diagnostic steps
- Scan stored codes
- Inspect supply circuit wiring and fuse
- Measure actuator supply voltage
- Test PCM power output
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P0005
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P0006
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P0007
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P0008
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P0010
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