P0677 Cylinder 7 Glow Plug Circuit Fault

Possible causes
– Faulty cylinder #7 glow plug
– Cylinder #7 glow plug harness is open or shroted
– Cylinder #7 glow plug circuit poor electrical connection
– Faulty glow plug module
When is the code detected?
The Engine Control Module (ECM) has detected a fault in the cylinder #7 glow plug circuit
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Lack/Loss of Power
– The engine may be harder to start
– Engine hesitation
P0677 Information for specific makes
P0677 FORD
P0677 GMC
P0677 VOLKSWAGEN