P1673
Cooling Fan Relay Circuit Malfunction
Severity
🔴 HighCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–33 (est.)
Symptoms
- Engine overheating
- Cooling fan does not turn on
- The fan runs constantly
- Check Engine light comes on
- Reduced engine power
Causes
- Faulty fan relay
- Open or short circuit in the circuit
- Damaged wiring harness
- Faulty engine control unit
- Fan circuit fuse problems
How to Fix
- Check and replace fan fuse
- Check the fan relay and replace if necessary
- Inspect the wiring harness for damage
- Check the operation of the fan by forcing it on
- Scan the control unit for additional errors