P0658moderate severityPowertrain
Actuator Supply Voltage A Circuit Low
on 1994-2007 Dodge Ram 2500 5.9L I6 Cummins Diesel · 4WD
What this code means
The PCM detected a low voltage condition on the actuator supply voltage A circuit. Actuators on this circuit may operate poorly or not at all.
Symptoms
- Actuator malfunction codes
- Components underperforming
- MIL illuminated
Common causes
- Short to ground in supply circuit
- Damaged wiring
- High resistance connection
- PCM internal fault
Diagnostic steps
- Read stored codes
- Inspect wiring for short to ground
- Measure supply voltage under load
- Test PCM power circuit
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