P0494
Fan 1 Underspeed
P0494 is an OBD-II diagnostic trouble code meaning: Fan 1 Underspeed. Common causes: faulty cooling fan, damaged wiring harness or connectors. Estimated repair cost: $22–167.
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–167 (est.)
Symptoms
- Engine overheating
- Increased coolant temperature
- Unstable fan operation
- Check Engine light comes on
Causes
- Faulty cooling fan
- Damaged wiring harness or connectors
- Faulty fan relay
- Fan control module problems
- Low coolant level
How to Fix
- Check coolant level
- Check fan wiring harness and connectors
- Check fan relays and fuses
- Check the fan speed using a diagnostic scanner
- Replace the fan if necessary
Related codes
Error P0494 by Vehicle Brand
AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye
FAQ
What does the P0494 code mean?
P0494 is an OBD-II diagnostic trouble code that indicates: Fan 1 Underspeed
What causes a P0494 error code?
The most common causes of P0494 include: Faulty cooling fan; Damaged wiring harness or connectors; Faulty fan relay; Fan control module problems.
How do I fix a P0494 diagnostic trouble code?
To fix P0494: Check coolant level. Check fan wiring harness and connectors. Check fan relays and fuses. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0494?
Limited driving only, diagnose soon
How much does it cost to fix P0494?
The estimated repair cost for P0494 is $22–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat