OBD Guide
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C05AA

ABS Pump Motor Temperature Too High

C05AA is an OBD-II diagnostic trouble code meaning: ABS Pump Motor Temperature Too High. Common causes: intensive abs/esp operation (long-term driving on slippery surfaces), mechanical wear of pump motor bearings. Estimated repair cost: $33–556.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–556 (est.)

Symptoms

  • ABS and ESP warning lights are on
  • Temporarily disabling ABS/ESP after heavy braking
  • Hot smell from the area where the ABS unit is located
  • ABS recovers after cooling (after 10–30 minutes)
  • For a chronic problem - permanent deactivation of ABS

Causes

  • Intensive ABS/ESP operation (long-term driving on slippery surfaces)
  • Mechanical wear of pump motor bearings
  • Contaminated or old brake fluid with high viscosity
  • Partial jamming of the hydraulic unit
  • Increased resistance in the power circuit (poor contact)
  • Motor temperature sensor malfunction (false positive)

How to Fix

  1. Allow the system to cool for 15-30 minutes, then check if the ABS is working again
  2. Read and remember all error codes
  3. Check the condition and level of the brake fluid - replace if necessary
  4. Check the pump power circuit for increased resistance
  5. If the error recurs during normal operation, check the pump motor
  6. If the pump is worn, replace the ABS hydraulic unit

Related codes

C0200C0245C0550

Error C05AA by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C05AA code mean?

C05AA is an OBD-II diagnostic trouble code that indicates: ABS Pump Motor Temperature Too High

What causes a C05AA error code?

The most common causes of C05AA include: Intensive ABS/ESP operation (long-term driving on slippery surfaces); Mechanical wear of pump motor bearings; Contaminated or old brake fluid with high viscosity; Partial jamming of the hydraulic unit.

How do I fix a C05AA diagnostic trouble code?

To fix C05AA: Allow the system to cool for 15-30 minutes, then check if the ABS is working again. Read and remember all error codes. Check the condition and level of the brake fluid - replace if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C05AA?

Limited driving only, diagnose soon

How much does it cost to fix C05AA?

The estimated repair cost for C05AA is $33–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat