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P0694 — Fan Control Circuit High
CautionCoolingLimp to the next safe stop
Seen on: Heavy Truck
Fan Control Circuit High. Common causes: Fan control circuit stuck high.
Don't risk it — get a diesel tech on the truck.
Look up listed providers near you and give them this code when you call.
How serious is it?
Caution. Limp to the next safe stop.
Most likely causes
- Fan control circuit stuck high
- Failed fan clutch
- wiring shorted high
First moves (roadside)
- Check fan clutch solenoid circuit
- test fan operation
- replace clutch if stuck engaged
FAQ
What does P0694 mean?
Fan Control Circuit High. Common causes: Fan control circuit stuck high.
How serious is P0694?
Caution — Limp to the next safe stop.
What's the most likely cause of P0694?
The most common cause is: Fan control circuit stuck high. Other possibilities include Failed fan clutch; wiring shorted high.
Can I keep driving with P0694?
Limp to the next safe stop. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Throwing this code right now?
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General diagnostic guidance for diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack and more). Not a substitute for a scan-tool diagnosis on your specific truck.