P1489 – Jeep DTC

Jeep DTC P1489 – High Speed Fan CTRL Relay Circuit

DTC P1489 meaning on Jeep

DTC P1489 on a Jeep refers to a fault in the High Speed Fan CTRL Relay Circuit. This diagnostic trouble code indicates an issue with the control circuit for the high-speed cooling fan relay.

Jeep DTC P1489 symptoms

Symptoms of DTC P1489 on a Jeep may include:

• Engine overheating
• High engine temperature readings
• Malfunction indicator light (MIL) illuminated on the dashboard

Jeep DTC P1489 causes

Common causes of DTC P1489 on a Jeep include:

• Defective high-speed cooling fan relay
• Faulty wiring or connections in the relay circuit
• Issues with the engine coolant temperature sensor

Jeep DTC P1489 seriousness

DTC P1489 should be addressed promptly as it can lead to engine overheating and potential damage if left unresolved. Ignoring this code may result in engine performance issues and possible engine damage.

How to diagnose DTC P1489 on Jeep

To diagnose DTC P1489 on a Jeep, follow these steps:

1. Use a scan tool to retrieve the fault codes stored in the vehicle’s computer.
2. Inspect the high-speed cooling fan relay for proper operation.
3. Check the wiring and connections in the relay circuit for any damage or corrosion.
4. Test the engine coolant temperature sensor for correct readings.

How to fix DTC P1489 on Jeep

To fix DTC P1489 on a Jeep, you can:

1. Replace the high-speed cooling fan relay if it is found to be faulty.
2. Repair any damaged wiring or connections in the relay circuit.
3. Replace the engine coolant temperature sensor if necessary.

How to erase DTC P1489 on Jeep

To erase DTC P1489 on a Jeep:

1. Use a scan tool to clear the fault codes stored in the vehicle’s computer.
2. Ensure that the underlying issue causing the fault code has been resolved.
3. Perform a test drive to confirm that the code does not reappear.

Recommended tools for Jeep diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.