AutoCodes – Generic – P0672

P0672 Code - Cylinder 2 Glow Plug Circuit Fault

Quick Answer

The glow plug system is used to assist in providing the heat required to begin combustion during cold engine temperatures. Common causes include Faulty cylinder #2 glow plug, Cylinder #2 glow plug harness is open or shorted, Cylinder #2 glow plug circuit poor electrical connection. 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 cylinder #2 glow plug, Cylinder #2 glow plug harness is open or shorted, Cylinder #2 glow plug circuit poor electrical connection.
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.

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Code Popularity 27,514

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 18, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0672 Description

The glow plug system is used to assist in providing the heat required to begin combustion during cold engine temperatures. The glow plugs are heated before and during cranking, as well as initial engine operation. The Engine Control Module (ECM) controls the glow plug ON times by monitoring coolant temperature and glow plug voltage. The California Glow Plug system has eight individual glow plug supply circuits between the controller and the glow plugs. If the feedback voltage from the controller to the ECM is not within range, the ECM sets the OBDII code.

OBDII Code P0672 - Cylinder 2 Glow Plug Circuit Fault - AutoCodes.com — P0672 Code - Cylinder 2 Glow Plug Circuit Fault

What does this mean?

What are the Possible Causes of the DTC P0672?

Faulty cylinder #2 glow plug
Cylinder #2 glow plug harness is open or shorted
Cylinder #2 glow plug circuit poor electrical connection
Faulty glow plug module

How to Fix the DTC P0672?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0672 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0672 code?

Need more information on how to fix the P0672 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0672 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0672 Audi — Cylinder 2 Glow Plug Circuit Fault
P0672 Chevrolet — Cylinder 2 Glow Plug Circuit Fault
P0672 Chrysler — Cylinder 2 Glow Plug Circuit Fault
P0672 Dodge — Cylinder 2 Glow Plug Circuit Fault
P0672 Ford — Cylinder 2 Glow Plug Circuit Fault
P0672 GMC — Cylinder 2 Glow Plug Circuit Fault
P0672 Isuzu — Cylinder 2 Glow Plug Circuit Fault
P0672 Jeep — Cylinder 2 Glow Plug Circuit Fault
P0672 RAM — Cylinder 2 Glow Plug Circuit Fault
P0672 Volkswagen — Cylinder 2 Glow Plug Circuit Fault

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.