OBD Guide
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C0285

Medium Pressure Accumulator Switch Remains Open

C0285 is an OBD-II diagnostic trouble code meaning: Medium Pressure Accumulator Switch Remains Open. Common causes: medium pressure accumulator switch malfunction, wiring harness problems. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • ABS/ESP indicator is on
  • Reduced braking performance
  • Unusual noises when braking

Causes

  • Medium Pressure Accumulator Switch Malfunction
  • Wiring Harness Problems
  • Malfunction of the brake control module

How to Fix

  1. Check the medium pressure accumulator switch for mechanical damage
  2. Check the integrity and connections of the wiring harness
  3. Scan the brake control module for errors
  4. Replace switch if necessary

Related codes

C0280C0281C0282

Error C0285 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C0285 code mean?

C0285 is an OBD-II diagnostic trouble code that indicates: Medium Pressure Accumulator Switch Remains Open

What causes a C0285 error code?

The most common causes of C0285 include: Medium Pressure Accumulator Switch Malfunction; Wiring Harness Problems; Malfunction of the brake control module.

How do I fix a C0285 diagnostic trouble code?

To fix C0285: Check the medium pressure accumulator switch for mechanical damage. Check the integrity and connections of the wiring harness. Scan the brake control module for errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C0285?

Limited driving only, diagnose soon

How much does it cost to fix C0285?

The estimated repair cost for C0285 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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