OBD Guide
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P064C

Glow Plug Control Module 1

P064C is an OBD-II diagnostic trouble code meaning: Glow Plug Control Module 1. Common causes: glow plug control module (gpcm) internal fault, lost communication between ecu and gpcm. Estimated repair cost: $17–278.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–278 (est.)

Symptoms

  • Check Engine light comes on
  • Long or difficult cold start of a diesel engine
  • White or blue smoke on cold start
  • Unstable engine operation when warming up
  • Glow plug indicator does not go out or light up

Causes

  • Glow Plug Control Module (GPCM) internal fault
  • Lost communication between ECU and GPCM
  • GPCM module power or ground failure
  • Malfunction of the glow plugs themselves (module overload)
  • ECU malfunction (rare)

How to Fix

  1. Check the operation of the glow plugs (current during warm-up should be 8–15 A per plug)
  2. Check power and ground of GPCM module
  3. Inspect the wiring between the ECU, GPCM and spark plugs
  4. Measure the resistance of each glow plug (good: 0.5-2 ohms)
  5. Diagnostics of the GPCM module with a specialized scanner
  6. If there is a malfunction, replace the GPCM module or glow plugs

Related codes

P0380P0381P0382P0383P0384

Error P064C by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P064C code mean?

P064C is an OBD-II diagnostic trouble code that indicates: Glow Plug Control Module 1

What causes a P064C error code?

The most common causes of P064C include: Glow Plug Control Module (GPCM) internal fault; Lost communication between ECU and GPCM; GPCM module power or ground failure; Malfunction of the glow plugs themselves (module overload).

How do I fix a P064C diagnostic trouble code?

To fix P064C: Check the operation of the glow plugs (current during warm-up should be 8–15 A per plug). Check power and ground of GPCM module. Inspect the wiring between the ECU, GPCM and spark plugs. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P064C?

Yes, but get it checked soon

How much does it cost to fix P064C?

The estimated repair cost for P064C is $17–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat