OBD Guide
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P0484

Fan Circuit Current High

P0484 is an OBD-II diagnostic trouble code meaning: Fan Circuit Current High. Common causes: fan impeller jamming (foreign object, bearing failure), turn-to-turn short circuit in the fan motor winding. Estimated repair cost: $33–156.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–156 (est.)

Symptoms

  • Check Engine Light Is On
  • Fan does not start (ECU cuts circuit for protection)
  • Fan fuse trips intermittently
  • Engine overheating
  • Burnt smell from engine compartment
  • The fan may hum when trying to start (mechanical blockage)

Causes

  • Fan impeller jamming (foreign object, bearing failure)
  • Turn-to-turn short circuit in the fan motor winding
  • Short circuit in fan circuit wiring
  • Faulty fan relay (permanent contact)
  • Short circuit in the fan control module
  • Damage to wiring from abrasion on the body or hot engine parts

How to Fix

  1. Turn off the power and manually check the fan impeller for free rotation.
  2. Check the fan motor: measure the resistance of the windings (if you have a diagram)
  3. Check fan circuit fuse - blown fuse confirms high current
  4. Inspect the fan wiring harness for melting or chafing.
  5. Check the relay connector and control module for signs of overheating and melting
  6. Replace the fan motor if it is stuck or internally shorted
  7. Replace damaged wiring
  8. Reset codes and ensure normal current consumption after repair

Related codes

P0480P0481P0482P0483P0485P0217

Error P0484 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0484 code mean?

P0484 is an OBD-II diagnostic trouble code that indicates: Fan Circuit Current High

What causes a P0484 error code?

The most common causes of P0484 include: Fan impeller jamming (foreign object, bearing failure); Turn-to-turn short circuit in the fan motor winding; Short circuit in fan circuit wiring; Faulty fan relay (permanent contact).

How do I fix a P0484 diagnostic trouble code?

To fix P0484: Turn off the power and manually check the fan impeller for free rotation.. Check the fan motor: measure the resistance of the windings (if you have a diagram). Check fan circuit fuse - blown fuse confirms high current. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0484?

Do not drive — repair immediately

How much does it cost to fix P0484?

The estimated repair cost for P0484 is $33–156. Actual cost depends on your vehicle, location, and labor rates.

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