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Engine-Codes – Generic – P0672

P0672 Code - Cylinder 2 Glow Plug Circuit Fault

Quick Answer

When the OBD-II code P0672 appears, it indicates a problem with the cylinder 2 glow plug circuit in a diesel engine. Common causes include Faulty glow plug in cylinder 2, Damaged or corroded wiring connecting the glow plug, Faulty connectors or poor electrical connections. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0672 indicates Cylinder 2 Glow Plug Circuit Fault.
Common causes
Common causes include Faulty glow plug in cylinder 2, Damaged or corroded wiring connecting the glow plug, Faulty connectors or poor electrical connections.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P0672 Description

When the OBD-II code P0672 appears, it indicates a problem with the cylinder 2 glow plug circuit in a diesel engine. Glow plugs are essential components that help heat the combustion chamber during cold starts, aiding in the ignition process. The glow plug circuit fault could result in difficulty starting the engine, rough idling, decreased fuel efficiency, increased emissions, and potential engine misfires. If left unaddressed, this issue can lead to further damage to the engine and exhaust system, potentially causing more costly repairs in the long run.

OBDII Code P0672 - Cylinder 2 Glow Plug Circuit Fault
P0672 Code - Cylinder 2 Glow Plug Circuit Fault

Common Causes of P0672

  1. Faulty glow plug in cylinder 2.
  2. Damaged or corroded wiring connecting the glow plug.
  3. Faulty connectors or poor electrical connections.
  4. Malfunctioning control module responsible for activating the glow plug.
  5. Electrical issues such as a blown fuse or short circuit in the circuit.

Symptoms of P0672

  1. Difficulty starting the engine, especially in cold weather.
  2. Rough idling or misfires upon startup.
  3. Reduced fuel efficiency.
  4. Increased emissions.
  5. Engine performance issues such as hesitation or lack of power.

How to Fix P0672

  1. Begin by diagnosing the specific cause of the glow plug circuit fault using a diagnostic scanner to retrieve the trouble code and perform electrical tests to pinpoint the issue.
  2. Inspect the glow plug in cylinder 2 to determine if it is functioning correctly. Replace the glow plug if necessary.
  3. Check the wiring and connectors for any damage or corrosion. Repair or replace any faulty components.
  4. Test the control module to ensure it is sending the correct signal to activate the glow plug. Replace the control module if it is malfunctioning.
  5. Clear the trouble code from the vehicle's computer system and test the vehicle to ensure the issue has been resolved.

Cost to Fix P0672

The typical repair costs for addressing a cylinder 2 glow plug circuit fault can range from $100 to $300, including parts and labor. However, it's essential to note that specific diagnosis time and labor rates can vary depending on the location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships and lower at independent shops. For a more accurate estimate, it is advisable to consult local rates before proceeding with the repair.

What does this mean?

Tech Notes for P0672

























User Submitted Video

When is the Code Detected?

The Engine Control Module (ECM) has detected a fault in the cylinder #2 glow plug circuit

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Code P0672 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0672 Code

1. What are the common symptoms of OBDII code P0672 (Cylinder 2 Glow Plug Circuit Fault)?

- Common symptoms include hard starting, rough idling, poor fuel efficiency, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P0672?

- Possible causes include a faulty glow plug in cylinder 2, damaged wiring or connectors in the glow plug circuit, or a malfunctioning glow plug control module.

3. How can I diagnose the issue related to OBDII code P0672?

- You can diagnose the issue by using a scan tool to read the trouble codes, testing the glow plug in cylinder 2 for continuity, and inspecting the wiring and connectors for any damage.

4. Can I still drive my vehicle with OBDII code P0672?

- It is not recommended to drive your vehicle with this code as it can lead to poor engine performance and potential damage. It's best to address the issue promptly.

5. How can I repair OBDII code P0672?

- To repair this code, you may need to replace the glow plug in cylinder 2, repair any damaged wiring or connectors, or replace the glow plug control module if necessary.

6. Are there any tips for preventing OBDII code P0672 from occurring again?

- Regularly inspecting and maintaining the glow plug system, ensuring proper connections, and using high-quality glow plugs can help prevent this code from reoccurring.

7. Can OBDII code P0672 be triggered by other underlying issues?

- While the code is specifically related to the cylinder 2 glow plug circuit fault, other issues like fuel system problems or engine misfires can sometimes trigger this code as well.

8. Is it possible to reset OBDII code P0672 without fixing the underlying issue?

- Resetting the code without fixing the underlying issue will only temporarily turn off the Check Engine Light. The problem will persist and may lead to more severe issues if not addressed.

9. How long does it typically take to repair OBDII code P0672?

- The repair time can vary depending on the exact cause of the issue. Simple fixes like replacing a glow plug may only take a short time, while more complex issues could require more extensive repairs.

10. Can I use a DIY approach to fix OBDII code P0672?

- Depending on your experience and tools available, you may be able to address this code yourself by following proper diagnostic procedures and repair steps. If unsure, it's best to consult a professional mechanic.

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