P0681

Cylinder 11 Glow Plug Circuit/Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–89 (est.)

Symptoms

Difficulty starting a large diesel engine at low temperatures
Check Engine Light
White smoke on cold start
Unstable engine operation
The glow plug indicator is on

Causes

Burnt out glow plug cylinder 11
Broken power wire
Damage to connector or wiring
GPCM module malfunction
Oxidation of contacts

How to Fix

Read OBD-II codes
Measure the resistance of the glow plug of cylinder 11 (standard: 0.5–2 Ohm)
Inspect the wiring and connector
Check supply voltage
Replace a faulty glow plug
If the error occurs again - GPCM diagnostics

Related codes

P0680 P0682 P0670