P1625high severityPowertrain
PCM System Reset
on 2005 Cadillac CTS 2.8L V6 · RWD
What this code means
The PCM has experienced an unexpected reset during operation. This can indicate a power supply issue or internal PCM fault.
Symptoms
- Check Engine Light
- Engine momentary stumble
- Loss of adaptive data
- Multiple codes may be stored
Common causes
- Intermittent power supply to PCM
- Loose PCM connector
- Internal PCM failure
- Low battery voltage
- Ignition switch issue
Diagnostic steps
- Check all PCM power and ground circuits
- Inspect PCM connectors
- Test battery and charging system
- Monitor PCM power with oscilloscope for dropouts
- Check ignition switch
Repair notes
Check PCM power and ground connections. Verify battery and charging system. Replace PCM if internal fault confirmed.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1