P0677 Buick 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
– Cylinder #7 glow plug harness is open or shroted
– Cylinder #7 glow plug circuit poor electrical connection
– Faulty glow plug module
What about the obd code?
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
– Lack/Loss of Power
– The engine may be harder to start
– Engine hesitation
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