P0672 Fault Code

Cylinder 2 Glow Plug Circuit

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0672 fault code indicates a problem with the glow plug circuit for cylinder 2 in diesel engines. This code is part of the engine diagnostic system that monitors the performance and operation of the glow plugs, which are crucial for starting a diesel engine in cold conditions. Glow plugs help heat the air in the combustion chamber, facilitating combustion during starting. When the Engine Control Module (ECM) detects an issue with the cylinder 2 glow plug circuit, it triggers the P0672 code.

What are the symptoms of the P0672 code?

Vehicle symptoms related to the P0672 code may include:

• Difficulty starting the engine, especially in cold weather
• Engine misfires or rough idling
• Decreased engine performance
• Increased exhaust smoke
• Warning lights illuminated on the dashboard, such as the Check Engine Light

What causes the P0672 code?

Common causes of the P0672 fault code can include:

• Faulty glow plug for cylinder 2
• Damaged wiring or connectors in the glow plug circuit
• Failed glow plug relay
• Issues with the ECM
• Short circuits or open circuits in the glow plug circuit

How to fix P0672?

To resolve the P0672 fault code, the following steps should be taken:

• Inspect the glow plug for cylinder 2 to determine if it is faulty or burned out; replace if necessary.
• Check the wiring and connections leading to the glow plug for any signs of damage or corrosion, repairing or replacing as needed.
• Test the glow plug relay and replace if it is found to be defective.
• Use a diagnostic scanner to clear the fault code and conduct a test drive to ensure the issue is resolved.