Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is saying that the little heater in the engine for cylinder 6 isn't working right. This heater helps the engine start when it's cold.
The P0676 code is triggered when the Engine Control Module (ECM) detects an open circuit or a fault in the glow plug circuit for cylinder 6.
Glow plugs are used in diesel engines to preheat the combustion chambers and help the engine start, especially in cold weather. The P0676 code indicates that there is an issue with the glow plug circuit for cylinder 6, which could be due to a faulty glow plug, wiring issues, or problems with the control module.
• Difficulty starting the engine, especially in cold weather
• Illuminated check engine light
• Rough idle or engine misfire
• Faulty glow plug in cylinder 6
• Damaged wiring or connectors in the glow plug circuit
• Faulty glow plug control module
Glow Plug: A device used to preheat the air in a diesel engine's cylinders to aid in starting.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code.
• Visually inspect the glow plug and its wiring for damage.
• Test the glow plug for continuity using a multimeter.
• Replace the faulty glow plug.
• Repair or replace damaged wiring or connectors.
• Replace the glow plug control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-250
• Chevrolet Silverado
• Dodge Ram 2500
• Regularly inspect glow plugs and wiring.
• Ensure proper maintenance of the electrical system.
• Use high-quality replacement parts.
Engine Performance
• Have the vehicle inspected by a professional if you're not comfortable with electrical diagnostics.
• Avoid starting the vehicle in extremely cold conditions until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on the glow plug system.
Glow plug issues are common in diesel engines, especially in older models or vehicles that operate in cold climates.
Moderate – The vehicle may still run, but starting problems can worsen, especially in cold weather.
Driving with a faulty glow plug can lead to increased emissions and potential engine starting issues.
• Engine cold start
• Ambient temperature below freezing
The glow plug for cylinder 6 is located on the engine block, typically near the cylinder head.
Q: Can I drive with a P0676 code?
A: You can drive, but you may experience starting issues, especially in cold weather. It's best to fix it soon.
Q: How long do glow plugs last?
A: Glow plugs typically last around 100,000 miles but can vary based on usage and conditions.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.