P0671 Buick Cylinder 1 Glow Plug Circuit Fault

P0672 Buick Cylinder 2 Glow Plug Circuit Fault

Possible causes
– Faulty cylinder #2 glow plug
– Cylinder #2 glow plug harness is open or shroted
– Cylinder #2 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 #2 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
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