What Does P0676 Mean? The oxygen (02) sensors on your car measure the oxygen in the exhaust to determine how rich or lean the ratio of fuel and air are in the cylinders. Optimizing this mixture means better fuel economy and fewer exhaust emissions. When you see P0676 engine fault code on your engine code reader this description will help you. engine code P0676P0676 fixobd P0676dtc P0676obd code P0676obd2 P0676P0676 car codediagnostic code P0676car code P0676check engine code P0676fehlercode P0676P0676 fiatcodigo P0676codigo falla P0676P0676 kody b??dówcodigo de falla P0676 What are the common causes of P0676 ? Several problems may cause a P0676 code including: Damaged or defective glow plug in cylinder 6 Damaged or defective glow plug module or timer Damaged or defective glow plug relay Possible blown fuse(s) Damaged, defective, corroded or loose wiring, harnesses, and related connectors in the glow plug circuit for cylinder 6 How do you troubleshoot P0676 ? Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Searches related to P0676 - Cylinder 6 Glow Plug Circuit Fault #6 glow plug on a duramax p0676 duramax p0677 p0678 p0674 p0675 po676 p0676 mercedes