Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the heater in the second cylinder of your car's engine. It's like when a toaster's wire is broken and it can't heat up.
The engine control module (ECM) has detected an open circuit or a fault in the glow plug circuit for cylinder 2.
The P0672 code is triggered when the ECM detects that the glow plug for cylinder 2 is not operating correctly. This could be due to an open circuit, a failed glow plug, or issues with the wiring or connectors. Glow plugs are used in diesel engines to help start the engine by heating the air in the cylinders.
• Difficulty starting the engine
• Rough idle when cold
• Increased exhaust smoke when starting
• Check Engine Light illuminated
• Faulty glow plug in cylinder 2
• Open or shorted glow plug circuit
• Damaged wiring or connectors
• Faulty glow plug control module
Glow Plug: A device used in diesel engines to heat the air in the cylinders to aid starting.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the glow plug and wiring for cylinder 2.
• Test the glow plug for proper resistance.
• Check the glow plug control module for faults.
• Replace the faulty glow plug.
• Repair or replace damaged wiring or connectors.
• Replace the glow plug control module if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Ford F-250
• Chevrolet Silverado
• Dodge Ram 2500
• Regularly inspect glow plugs and wiring.
• Perform routine maintenance on the engine.
• Use high-quality fuel to prevent deposits.
Engine Performance
• Have the vehicle inspected by a professional.
• Avoid prolonged idling in cold weather.
• Ensure regular maintenance checks.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
Glow plug circuit issues are common in diesel engines, especially in colder climates where glow plugs are used more frequently.
Moderate – Addressing this issue will improve engine starting and performance, especially in cold weather.
Driving with a faulty glow plug can lead to increased emissions and potential damage to the engine over time.
• Cold engine start
• Ambient temperature below 50°F
The glow plug for cylinder 2 is located on the engine block, typically near the top of the cylinder head.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to difficulty starting the engine, especially in cold weather, and may cause further engine damage over time.
Q: Can I drive my car with this code?
A: While you can drive with this code, it's advisable to fix it soon to avoid starting issues and potential engine damage.
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