OBD Guide
ENFRDEESPT

P1660

Cooling Fan Control Circuit

P1660 is an OBD-II diagnostic trouble code meaning: Cooling Fan Control Circuit. Common causes: open or short circuit in control circuit, faulty fan relay. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Cooling fan does not turn on
  • Engine overheating
  • Check Engine Light Is On
  • Unstable engine operation at high temperatures
  • The fan runs constantly or does not turn off

Causes

  • Open or short circuit in control circuit
  • Faulty fan relay
  • Blown fuse
  • Fan motor problems
  • Engine control unit (ECU) malfunction

How to Fix

  1. Check fan circuit fuses
  2. Check fan relay
  3. Inspect the wiring harness for damage
  4. Check the operation of the fan motor
  5. Check control signals from the ECU

Related codes

P1650P1651P1652

Error P1660 by Vehicle Brand

AcuraBuickCadillacChevroletFordGMGMCHondaInfinitiKiaLincolnMercuryOldsmobileSaturn

FAQ

What does the P1660 code mean?

P1660 is an OBD-II diagnostic trouble code that indicates: Cooling Fan Control Circuit

What causes a P1660 error code?

The most common causes of P1660 include: Open or short circuit in control circuit; Faulty fan relay; Blown fuse; Fan motor problems.

How do I fix a P1660 diagnostic trouble code?

To fix P1660: Check fan circuit fuses. Check fan relay. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1660?

Limited driving only, diagnose soon

How much does it cost to fix P1660?

The estimated repair cost for P1660 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat