AutoCodes – Isuzu – P0672 Isuzu

P0672 Isuzu 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 Isuzu 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 8,718
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 05, 2019
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Code P0672 Isuzu 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 Isuzu - Cylinder 2 Glow Plug Circuit Fault - AutoCodes.com
P0672 Isuzu Code - Cylinder 2 Glow Plug Circuit Fault

What are the Possible Causes of the DTC P0672 Isuzu?

  • 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 Isuzu?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0672 Isuzu 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 Isuzu code?

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

Need Help with the Code?

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

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 Isuzu Code

1. What are the common symptoms of OBDII code P0672 in an Isuzu related to the Cylinder 2 Glow Plug Circuit Fault?

- Common symptoms include hard starting, rough idling, reduced engine performance, and increased exhaust smoke.

2. What causes the Cylinder 2 Glow Plug Circuit Fault (P0672) in an Isuzu?

- The code P0672 is typically triggered by a faulty glow plug in cylinder 2, a damaged glow plug wiring harness, or a malfunction in the glow plug control module.

3. How can I diagnose the Cylinder 2 Glow Plug Circuit Fault in my Isuzu?

- Diagnose the issue by checking the glow plug in cylinder 2 for continuity, inspecting the wiring harness for damage, and testing the glow plug control module for proper functionality.

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

- It is not recommended to drive the vehicle with the Cylinder 2 Glow Plug Circuit Fault as it can lead to engine performance issues and potential damage if left unresolved.

5. What is the typical repair process for addressing the P0672 code in an Isuzu?

- The repair process involves identifying the faulty component (glow plug, wiring harness, or control module), replacing the defective part, clearing the code, and testing the system to ensure proper functioning.

6. Are there any preventive measures to avoid the Cylinder 2 Glow Plug Circuit Fault in my Isuzu?

- To prevent the recurrence of the fault, it is advisable to perform regular maintenance checks on the glow plug system and promptly address any issues detected during routine inspections.

7. Can a DIY enthusiast fix the P0672 code in an Isuzu, or is professional assistance required?

- While some experienced DIY enthusiasts may be able to replace a faulty glow plug or wiring harness, diagnosing and repairing issues related to the glow plug circuit may require professional assistance for accurate troubleshooting.

8. How long does it typically take to repair the Cylinder 2 Glow Plug Circuit Fault in an Isuzu?

- The repair time can vary depending on the extent of the issue and the availability of parts, but a skilled technician can usually address the P0672 code within a few hours to a day.

9. Will resetting the OBDII code P0672 on my Isuzu make the issue disappear permanently?

- Resetting the code without addressing the underlying problem will only temporarily clear the fault indicator. It is crucial to diagnose and repair the root cause to prevent the code from reoccurring.

10. Is the Cylinder 2 Glow Plug Circuit Fault a common issue in Isuzu vehicles?

- Glow plug circuit faults, including the Cylinder 2 Glow Plug Circuit Fault (P0672), can occur in Isuzu vehicles, especially in diesel engines, due to the wear and tear of components over time. Regular maintenance can help prevent such issues.

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