OBD-II Code P0672 is indicative of a problem in the glow plug circuit for cylinder 2 in diesel engines. The glow plug’s primary function is to preheat the cylinder before the engine starts, improving ignition, especially in cold conditions.
What Does the P0672 Code Mean?
The P0672 code means there is an issue with the glow plug circuit for cylinder 2. When the Engine Control Module (PCM) detects that the glow plug isn’t functioning correctly, it triggers this code to alert the driver of a potential problem.
What Causes the P0672 Code?
Several factors can lead to the P0672 code being triggered, including:
- Glow plug control module failure
- Glow plug failure
- Glow plug wiring harness failure
What Are the Symptoms of the P0672 Code?
Common symptoms associated with the P0672 code include:
- The engine may not start
- Hard or no start in cold weather
How Serious Is the P0672 Code?
The P0672 code is classified as urgent. If left unaddressed, it can lead to severe engine damage or create safety hazards for the driver and passengers. Immediate action is recommended to avoid complications.
How to Diagnose the P0672 Code
To diagnose the P0672 code, a mechanic will typically follow these steps:
- Use an OBD-II scanner to confirm the P0672 code and check for any additional codes.
- Inspect the glow plug wiring harness for damage or corrosion.
- Test the glow plug and control module for proper functionality.
- Perform a visual inspection of connections and relays associated with the glow plug system.
Common Repairs for the P0672 Code
Common repairs that may be required to resolve the P0672 code include:
- Replacing the faulty glow plug
- Repairing or replacing the wiring harness
- Replacing the glow plug control module
How Much Does It Cost to Fix the P0672 Code?
The cost to fix the P0672 code can vary significantly based on the underlying issue:
- Glow plug replacement may range from $100 to $300.
- Wiring harness repairs can vary widely based on the complexity of the repair.
- Control module replacement might cost between $200 and $500.
Can I Fix the P0672 Code Myself?
While some DIY enthusiasts may attempt to fix the P0672 code, it’s essential to have a clear understanding of the diagnostic process and the components involved. If you are not comfortable working with electrical systems or lack the necessary tools, it is advisable to seek professional assistance to ensure a proper fix.
