OBD Guide
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P1481

Cooling Fan Speed Signal Lost

P1481 is an OBD-II diagnostic trouble code meaning: Cooling Fan Speed Signal Lost. Common causes: open or short circuit in the fan circuit, fan speed sensor malfunction. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$17–56 (est.)

Symptoms

  • Engine overheating
  • Unstable cooling fan operation
  • Check Engine Light Illuminated
  • Reduced engine performance

Causes

  • Open or short circuit in the fan circuit
  • Fan speed sensor malfunction
  • Fan relay problems
  • Engine control unit malfunction
  • Wiring harness damage

How to Fix

  1. Check the fan circuit for breaks and short circuits
  2. Check fan speed sensor
  3. Check fan relay
  4. Check the condition of the wiring harness
  5. If necessary, replace the cooling fan

Related codes

P0480P0481

Error P1481 by Vehicle Brand

DodgeFordJeepLincolnMercedes-BenzMercuryPlymouthPontiac

FAQ

What does the P1481 code mean?

P1481 is an OBD-II diagnostic trouble code that indicates: Cooling Fan Speed Signal Lost

What causes a P1481 error code?

The most common causes of P1481 include: Open or short circuit in the fan circuit; Fan speed sensor malfunction; Fan relay problems; Engine control unit malfunction.

How do I fix a P1481 diagnostic trouble code?

To fix P1481: Check the fan circuit for breaks and short circuits. Check fan speed sensor. Check fan relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1481?

Do not drive — repair immediately

How much does it cost to fix P1481?

The estimated repair cost for P1481 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat