OBD Guide
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P06FC

Glow Plug Control Module 2 to PCM Communication Circuit

P06FC is an OBD-II diagnostic trouble code meaning: Glow Plug Control Module 2 to PCM Communication Circuit. Common causes: physical break or short circuit of the lin/can bus between the ecu and gpcm2, malfunction of the data bus transceiver in gpcm2 or ecu. 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
  • The ECU does not see GPCM2 through the diagnostic scanner
  • The second group spark plug system works unpredictably
  • Difficult cold start
  • Error codes for cylinders of the second group

Causes

  • Physical break or short circuit of the LIN/CAN bus between the ECU and GPCM2
  • Malfunction of the data bus transceiver in GPCM2 or ECU
  • Noise or instability on the data bus
  • Incorrect addressing of GPCM2 on the bus
  • GPCM2 internal fault

How to Fix

  1. Read error codes on the data bus and determine the extent of the problem
  2. Check the physical integrity of the LIN/CAN bus from the ECU to GPCM2
  3. Measure the voltage on the LIN bus - it should be 12 V in Recessive mode
  4. Check the presence of power and grounding of GPCM2
  5. Make sure there are no other devices on the bus causing interference
  6. If confirmed, replace GPCM2 or repair the bus fault

Related codes

P06FDP06F5P06F6U0073U0100

Error P06FC by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P06FC code mean?

P06FC is an OBD-II diagnostic trouble code that indicates: Glow Plug Control Module 2 to PCM Communication Circuit

What causes a P06FC error code?

The most common causes of P06FC include: Physical break or short circuit of the LIN/CAN bus between the ECU and GPCM2; Malfunction of the data bus transceiver in GPCM2 or ECU; Noise or instability on the data bus; Incorrect addressing of GPCM2 on the bus.

How do I fix a P06FC diagnostic trouble code?

To fix P06FC: Read error codes on the data bus and determine the extent of the problem. Check the physical integrity of the LIN/CAN bus from the ECU to GPCM2. Measure the voltage on the LIN bus - it should be 12 V in Recessive mode. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P06FC?

Yes, but get it checked soon

How much does it cost to fix P06FC?

The estimated repair cost for P06FC is $17–333. Actual cost depends on your vehicle, location, and labor rates.

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