OBD Guide
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P05E9

Engine Oil Bypass Valve Control Circuit Low

P05E9 is an OBD-II diagnostic trouble code meaning: Engine Oil Bypass Valve Control Circuit Low. Common causes: valve control wire short to ground, short circuit of valve internal winding. Estimated repair cost: $33–133.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–133 (est.)

Symptoms

  • Check Engine Light Is On
  • Noise from hydraulic timing chains
  • Unstable operation of VVT (variable valve timing)
  • Increased or decreased oil pressure
  • Knock when starting engine cold

Causes

  • Valve control wire short to ground
  • Short circuit of valve internal winding
  • Damage to wiring insulation (pinching on metal)
  • Moisture entering the valve connector
  • ECU output stage malfunction

How to Fix

  1. Read codes, record operating parameters
  2. Disconnect the bypass valve connector and measure the resistance of its winding
  3. Check the resistance of the control wire to ground (with the ECU connector disconnected)
  4. Inspect the wiring for pinched or damaged insulation.
  5. Check the connector for moisture and oxidation
  6. Replace the valve or eliminate short circuit in the wiring

Related codes

P05E8P05EAP0520P0521P0011

Error P05E9 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P05E9 code mean?

P05E9 is an OBD-II diagnostic trouble code that indicates: Engine Oil Bypass Valve Control Circuit Low

What causes a P05E9 error code?

The most common causes of P05E9 include: Valve control wire short to ground; Short circuit of valve internal winding; Damage to wiring insulation (pinching on metal); Moisture entering the valve connector.

How do I fix a P05E9 diagnostic trouble code?

To fix P05E9: Read codes, record operating parameters. Disconnect the bypass valve connector and measure the resistance of its winding. Check the resistance of the control wire to ground (with the ECU connector disconnected). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P05E9?

Limited driving only, diagnose soon

How much does it cost to fix P05E9?

The estimated repair cost for P05E9 is $33–133. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat