OBD Guide
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C004A

Brake Lining Wear Sensor

C004A is an OBD-II diagnostic trouble code meaning: Brake Lining Wear Sensor. Common causes: low oil level, worn oil pump. Estimated repair cost: $22–556.

Severity
🚨 Critical
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$22–556 (est.)

Symptoms

  • Oil pressure indicator is on
  • Knocking or noise from the engine
  • Reduced engine power
  • Engine overheating

Causes

  • Low oil level
  • Worn oil pump
  • Dirty oil filter
  • Excessive engine wear
  • Oil dilution (fuel or coolant ingress)
  • Oil pressure sensor malfunction

How to Fix

  1. Check the oil level and add if necessary
  2. Change oil and oil filter
  3. Check the condition of the oil pump
  4. Conduct engine diagnostics for wear
  5. Replace the oil pressure sensor if it is faulty

Related codes

P0522P0523P0530

Error C004A by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C004A code mean?

C004A is an OBD-II diagnostic trouble code that indicates: Brake Lining Wear Sensor

What causes a C004A error code?

The most common causes of C004A include: Low oil level; Worn oil pump; Dirty oil filter; Excessive engine wear.

How do I fix a C004A diagnostic trouble code?

To fix C004A: Check the oil level and add if necessary. Change oil and oil filter. Check the condition of the oil pump. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C004A?

Yes, but get it checked soon

How much does it cost to fix C004A?

The estimated repair cost for C004A is $22–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat