OBD Guide
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P1489

High Speed Radiator Fan Control Relay Condition

P1489 is an OBD-II diagnostic trouble code meaning: High Speed Radiator Fan Control Relay Condition. Common causes: faulty fan relay, open or short circuit in control circuit. Estimated repair cost: $6–28.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–28 (est.)

Symptoms

  • Engine overheating under load
  • Radiator fan does not turn on at high speed
  • Check Engine Light Is On
  • Reduced cooling efficiency

Causes

  • Faulty fan relay
  • Open or short circuit in control circuit
  • Blown fuse
  • Problems with the engine control unit
  • Oxidation of contacts in connectors

How to Fix

  1. Check the fan circuit fuse
  2. Test the fan relay
  3. Check the integrity of wiring and contacts
  4. Diagnose the operation of the control unit
  5. Replace faulty components

Related codes

P0480P0481P0691

Error P1489 by Vehicle Brand

DodgeJeepMitsubishiPlymouthPontiac

FAQ

What does the P1489 code mean?

P1489 is an OBD-II diagnostic trouble code that indicates: High Speed Radiator Fan Control Relay Condition

What causes a P1489 error code?

The most common causes of P1489 include: Faulty fan relay; Open or short circuit in control circuit; Blown fuse; Problems with the engine control unit.

How do I fix a P1489 diagnostic trouble code?

To fix P1489: Check the fan circuit fuse. Test the fan relay. Check the integrity of wiring and contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1489?

Limited driving only, diagnose soon

How much does it cost to fix P1489?

The estimated repair cost for P1489 is $6–28. Actual cost depends on your vehicle, location, and labor rates.

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