Cooling Fan 1 Control Circuit High
Cooling Fan 1 Control Circuit High: the control-circuit voltage is above the expected range. Reduced cooling-fan control can let the engine or A/C condenser overheat.
Affected components
- Cooling fan
- Cooling fan relay
Common causes
- High likelihood: Fan relay defective
- Medium likelihood: Wiring shorted to power
- Low likelihood: Connector pins corroded - high contact resistance
Possible symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.