P0693
PowertrainCooling Fanhigh severityFan 2 Control Circuit Low
What P0693 Means
The PCM detected a low voltage condition in the cooling fan 2 control circuit. Fan 2 may fail to operate, reducing cooling capacity and risking overheating.
Symptoms
- Engine overheating
- Second cooling fan not running
- Check engine light on
Common Causes
- Short to ground in fan 2 wiring
- Failed fan 2 relay
- Faulty fan 2 motor
- Damaged PCM output driver
Diagnostic Steps
- Scan and confirm P0693 code
- Inspect fan 2 control wiring
- Test fan 2 relay and motor
- Check PCM fan 2 output signal
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