OBD Guide
ENFRDEESPT

P1484

Cooling Fan RPM Signal Malfunction

P1484 is an OBD-II diagnostic trouble code meaning: Cooling Fan RPM Signal Malfunction. Common causes: fan speed sensor malfunction, damage to wiring or connectors. Estimated repair cost: $17–56.

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

Symptoms

  • Engine overheating
  • Cooling fan malfunction
  • Increased fuel consumption
  • Check Engine light comes on
  • Reduced engine power

Causes

  • Fan speed sensor malfunction
  • Damage to wiring or connectors
  • Fan control unit malfunction
  • Mechanical failure of the fan
  • Fan relay problems

How to Fix

  1. Check the condition of the fan speed sensor
  2. Inspect wiring and connectors for damage
  3. Check fan relay operation
  4. Test the fan control unit
  5. Replace faulty components

Related codes

P1485P1486P1487

Error P1484 by Vehicle Brand

DodgeFordJeepLincolnMercuryPlymouthPontiac

FAQ

What does the P1484 code mean?

P1484 is an OBD-II diagnostic trouble code that indicates: Cooling Fan RPM Signal Malfunction

What causes a P1484 error code?

The most common causes of P1484 include: Fan speed sensor malfunction; Damage to wiring or connectors; Fan control unit malfunction; Mechanical failure of the fan.

How do I fix a P1484 diagnostic trouble code?

To fix P1484: Check the condition of the fan speed sensor. Inspect wiring and connectors for damage. Check fan relay operation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1484?

Do not drive — repair immediately

How much does it cost to fix P1484?

The estimated repair cost for P1484 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat