P1651
PCM Output Controls Fault
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$56–278 (est.)
Symptoms
- Unstable engine operation
- Power dips
- Check Engine Light Illuminates
- Disabling some engine management systems
- Gear shifting problems (on automatic transmissions)
Causes
- PCM malfunction
- Open or short circuit in control circuit
- Poor contact in PCM connectors
- PCM power problems
- Contact corrosion
How to Fix
- Check PCM Memory Error Codes
- Check the integrity of the wiring harness to the PCM
- Check contacts in PCM connectors
- Check PCM power and ground
- Replace PCM if necessary