P0694
PowertrainCooling Fanhigh severityFan 2 Control Circuit High
What P0694 Means
The PCM detected a high voltage condition in the cooling fan 2 control circuit. Fan 2 may run continuously or not respond, affecting engine cooling.
Symptoms
- Second cooling fan runs constantly
- Engine overheating
- Check engine light on
Common Causes
- Short to voltage in fan 2 wiring
- Failed fan 2 relay
- Corroded fan 2 connector
- Damaged PCM output driver
Diagnostic Steps
- Scan and confirm P0694 code
- Inspect fan 2 wiring for short to power
- Test fan 2 relay operation
- Check PCM fan 2 output signal
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Community Confirmed Fixes
No confirmed fixes yet for this code. Be the first to contribute!
Submit a FixFound a Fix for P0694?
Help other technicians by sharing what worked on your vehicle.
Submit Your Fix