P0677

Cylinder 7 Glow Plug Circuit/Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$22–67 (est.)

Symptoms

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

Causes

Burnt out glow plug for cylinder 7
Broken power wire
Oxidation or damage to the connector
GPCM module malfunction
Wiring damage

How to Fix

Read OBD-II error codes
Measure the resistance of the spark plug of cylinder 7 (standard: 0.5–2 Ohm)
Inspect the wiring and spark plug connector
Check supply voltage
Replace a faulty glow plug
If the error occurs again, check GPCM

Related codes

P0676 P0678 P068C P068D P0670