P068F
Cylinder 8 Glow Plug Control Circuit High
P068F is an OBD-II diagnostic trouble code meaning: Cylinder 8 Glow Plug Control Circuit High. Common causes: short circuit of the control wire to power (+12 v), open ground circuit. Estimated repair cost: $17–278.
Symptoms
- Difficulty starting a diesel engine at low temperatures
- Check Engine Light
- White smoke on cold start
- Unstable engine operation
- Glow plug indicator on the dashboard
Causes
- Short circuit of the control wire to power (+12 V)
- Open ground circuit
- GPCM module malfunction
- Damage to wiring or connectors
- Internal ECU fault
How to Fix
- Read OBD-II codes and capture data
- Inspect the wiring and connectors of cylinder 8 spark plug and GPCM module
- Measure the voltage in the control circuit
- Check the ground circuit for open circuit
- Check the wire for short to power
- If serviceable - diagnostics and replacement of GPCM or ECU
Related codes
Error P068F by Vehicle Brand
FAQ
What does the P068F code mean?
P068F is an OBD-II diagnostic trouble code that indicates: Cylinder 8 Glow Plug Control Circuit High
What causes a P068F error code?
The most common causes of P068F include: Short circuit of the control wire to power (+12 V); Open ground circuit; GPCM module malfunction; Damage to wiring or connectors.
How do I fix a P068F diagnostic trouble code?
To fix P068F: Read OBD-II codes and capture data. Inspect the wiring and connectors of cylinder 8 spark plug and GPCM module. Measure the voltage in the control circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P068F?
Yes, but get it checked soon
How much does it cost to fix P068F?
The estimated repair cost for P068F is $17–278. Actual cost depends on your vehicle, location, and labor rates.
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