High Speed Fan CTRL Relay Circuit
1998-2003 Dodge Durango 5.9L V8
Description
The PCM has detected a malfunction in the high-speed cooling fan relay control circuit. The relay that activates the cooling fan at high speed is not responding to PCM commands.
Symptoms
- Check Engine Light
- Engine overheating at idle or in traffic
- A/C performance reduced
- Cooling fan does not run at high speed
Common Causes
- Faulty high-speed fan relay
- Wiring open or short in relay circuit
- Corroded relay socket
- Faulty cooling fan motor
- PCM driver failure
Diagnostic Steps
- Swap high-speed fan relay with a known good relay
- Check relay socket for power, ground, and PCM control
- Test cooling fan motor directly with battery power
- Inspect relay circuit wiring
- Check PCM output to relay
Repair Notes
Replace the high-speed fan relay if faulty; test the fan motor and repair wiring as needed.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1489 on Other Vehicles
Common Questions
What does code P1489 mean on a 1998-2003 Dodge Durango?
P1489 stands for "High Speed Fan CTRL Relay Circuit". The PCM has detected a malfunction in the high-speed cooling fan relay control circuit. The relay that activates the cooling fan at high speed is not responding to PCM commands.
What are the symptoms of P1489 on a Dodge Durango?
Common symptoms of P1489 include: Check Engine Light, Engine overheating at idle or in traffic, A/C performance reduced, Cooling fan does not run at high speed.
What causes P1489 on a 1998-2003 Dodge Durango?
Common causes of P1489 include: Faulty high-speed fan relay, Wiring open or short in relay circuit, Corroded relay socket, Faulty cooling fan motor, PCM driver failure.