OBD Guide
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P0285

Cylinder 9 Injector A Circuit Low

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$33–222 (est.)

Symptoms

  • Misfire in cylinder 9
  • Engine vibration
  • Power reduction
  • Check Engine light comes on (possibly flashing)
  • Smell of unburned fuel from the exhaust

Causes

  • Injector wire short circuit to ground
  • Broken injector power wire
  • Internal short circuit of the injector winding
  • Damage to the wiring harness near the exhaust manifold
  • ECU transistor switch malfunction

How to Fix

  1. Read codes and record misfire codes (P0309)
  2. Measure the resistance of the injector of cylinder 9 (standard 12–16 Ohms)
  3. Check the supply voltage at the injector connector
  4. Inspect the injector wiring harness for thermal damage.
  5. Check the harness for breaks and short to ground
  6. If wiring and injectors are excluded - ECU diagnostics

Related codes

P0261P0264P0267P0270P0273P0276P0279P0282P0300P0309

Error P0285 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye
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