P1479
High Fan Control Primary Circuit Malfunction
P1479 is an OBD-II diagnostic trouble code meaning: High Fan Control Primary Circuit Malfunction. Common causes: faulty fan relay, open or short circuit in control circuit. Estimated repair cost: $17–94.
Symptoms
- Engine overheating under high load conditions
- Cooling fan does not turn on at high speeds
- Check Engine Light Illuminated
- Reduced engine power when overheated
- Increase in coolant temperature
Causes
- Faulty fan relay
- Open or short circuit in control circuit
- Problems with wiring harness or contacts
- Faulty fan motor
- Problems with the engine control unit
How to Fix
- Check fuses associated with the cooling system
- Check the fan relay and replace if necessary
- Inspect the wiring harness and connectors for damage.
- Check the resistance and operation of the fan motor
- Check control signals from the ECU using a diagnostic scanner
Related codes
Error P1479 by Vehicle Brand
FAQ
What does the P1479 code mean?
P1479 is an OBD-II diagnostic trouble code that indicates: High Fan Control Primary Circuit Malfunction
What causes a P1479 error code?
The most common causes of P1479 include: Faulty fan relay; Open or short circuit in control circuit; Problems with wiring harness or contacts; Faulty fan motor.
How do I fix a P1479 diagnostic trouble code?
To fix P1479: Check fuses associated with the cooling system. Check the fan relay and replace if necessary. Inspect the wiring harness and connectors for damage.. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1479?
Limited driving only, diagnose soon
How much does it cost to fix P1479?
The estimated repair cost for P1479 is $17–94. Actual cost depends on your vehicle, location, and labor rates.
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