OBD Guide
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P05D8

PCV Regulator Valve Control Circuit/Open

P05D8 is an OBD-II diagnostic trouble code meaning: PCV Regulator Valve Control Circuit/Open. Common causes: open wire in pcv valve control circuit, faulty (burnt or oxidized) pcv regulator valve connector. Estimated repair cost: $22–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–89 (est.)

Symptoms

  • Check Engine Light Is On
  • Unstable engine idling
  • Increased oil consumption
  • Exhaust smell in the cabin
  • The appearance of smoke from under the hood when the engine is running for a long time
  • Dirty throttle valve and intake manifold

Causes

  • Open wire in PCV valve control circuit
  • Faulty (burnt or oxidized) PCV regulator valve connector
  • Internal break in PCV solenoid valve winding
  • Damage to the wiring harness in the engine area due to high temperatures
  • ECU output driver malfunction (rare)

How to Fix

  1. Read fault codes; pay attention to the associated crankcase ventilation system codes
  2. Visually inspect the PCV valve and its connector for oil contamination, corrosion, melted insulation
  3. Check the presence of power and control signal at the valve connector with the engine running.
  4. Measure the resistance of the PCV valve winding - compare with the standard according to the documentation
  5. Check the control wire from the ECU to the valve for a break
  6. Replace the PCV regulator valve if it is confirmed to be faulty

Related codes

P05D9P05DAP0171P0172P051B

Error P05D8 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P05D8 code mean?

P05D8 is an OBD-II diagnostic trouble code that indicates: PCV Regulator Valve Control Circuit/Open

What causes a P05D8 error code?

The most common causes of P05D8 include: Open wire in PCV valve control circuit; Faulty (burnt or oxidized) PCV regulator valve connector; Internal break in PCV solenoid valve winding; Damage to the wiring harness in the engine area due to high temperatures.

How do I fix a P05D8 diagnostic trouble code?

To fix P05D8: Read fault codes; pay attention to the associated crankcase ventilation system codes. Visually inspect the PCV valve and its connector for oil contamination, corrosion, melted insulation. Check the presence of power and control signal at the valve connector with the engine running.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P05D8?

Limited driving only, diagnose soon

How much does it cost to fix P05D8?

The estimated repair cost for P05D8 is $22–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat