OBD Guide
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P06F8

Glow Plug Control Module 2 Control Circuit High

P06F8 is an OBD-II diagnostic trouble code meaning: Glow Plug Control Module 2 Control Circuit High. Common causes: broken wire of the ecu-gpcm2 control line, closing the control wire with the power circuit. Estimated repair cost: $17–333.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–333 (est.)

Symptoms

  • Check Engine light on
  • No communication with GPCM2 on the scanner
  • Spark plugs of the second group do not warm up
  • Difficult cold starting of diesel
  • Unstable engine operation after a cold start

Causes

  • Broken wire of the ECU-GPCM2 control line
  • Closing the control wire with the power circuit
  • Oxidation of GPCM2 connector contacts
  • Internal fault GPCM2 (input circuit break)
  • Mechanical damage to the wiring harness

How to Fix

  1. Inspect the wiring harness from the ECU to GPCM2 for breaks and damage
  2. Check the contacts of the GPCM2 connector for oxidation
  3. Measure the resistance of the control wire from the ECU to GPCM2 (with the units disconnected)
  4. Repair the break or restore contact in the connector
  5. If there is a short circuit to “plus”, find the location of the short circuit and eliminate it
  6. If there is an internal fault in GPCM2, replace the module

Related codes

P06F5P06F6P06F7P06FAP06FB

Error P06F8 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P06F8 code mean?

P06F8 is an OBD-II diagnostic trouble code that indicates: Glow Plug Control Module 2 Control Circuit High

What causes a P06F8 error code?

The most common causes of P06F8 include: Broken wire of the ECU-GPCM2 control line; Closing the control wire with the power circuit; Oxidation of GPCM2 connector contacts; Internal fault GPCM2 (input circuit break).

How do I fix a P06F8 diagnostic trouble code?

To fix P06F8: Inspect the wiring harness from the ECU to GPCM2 for breaks and damage. Check the contacts of the GPCM2 connector for oxidation. Measure the resistance of the control wire from the ECU to GPCM2 (with the units disconnected). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P06F8?

Yes, but get it checked soon

How much does it cost to fix P06F8?

The estimated repair cost for P06F8 is $17–333. Actual cost depends on your vehicle, location, and labor rates.

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