AutoCodes – Chevrolet – P0672 Chevrolet

P0672 Chevrolet Code - Cylinder 2 Glow Plug Circuit Fault

Quick Answer

n the diesel engine, air alone is compressed in the cylinder. 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 Chevrolet 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 2,660

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 24, 2024

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

n the diesel engine, air alone is compressed in the cylinder. Then, after the air has been compressed, a charge of fuel is sprayed into the cylinder and ignition occurs, due to the heat of compression. Eight glow plugs are used as an aid to starting.
Control of the glow plugs is accomplished by the Glow Plug Control Module. The nominal voltage for the glow plugs is 5.4 volts. When the ignition is turned On, the Glow Plug Control Module applies 7.2 V for 2.2 s, then 5.7 V for 0.8 s, and then 5.4 V until 1200°C (2192°F) is reached. The maximum voltage of the system is 10 V. While the engine is running the voltage will vary between 4.7 - 10 V when in closed loop control to maintain a glow plug temperature that ranges from 1150° - 1180°C (2102° - 2156°F). The temperature and the power consumption are controlled between the Engine Control Module (ECM) and the Glow Plug Control Module within a wide range to suit the engine's pre-heating requirements. Each glow plug is energized individually. This capability yields more optimum heat times for the glow plugs, thus pre - glow times can be kept to a minimum for a short wait to crank times and maximum glow plug durability.

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

What does this mean?

What are the Possible Causes of the DTC P0672 Chevrolet?

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 Control Module (GPCM)

How to Fix the DTC P0672 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

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

Information for Specific Chevrolet Models

P0672 2014 Chevrolet Silverado — Cylinder 2 Glow Plug Circuit Fault
P0672 2015 Chevrolet Silverado — Cylinder 2 Glow Plug Circuit Fault
P0672 2016 Chevrolet Silverado — Cylinder 2 Glow Plug Circuit Fault
P0672 2017 Chevrolet Silverado — Cylinder 2 Glow Plug Circuit Fault
P0672 2018 Chevrolet Silverado — 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 Chevrolet Code

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

- Common symptoms include hard starting, rough idling, reduced engine performance, and the illumination of the Check Engine light.

2. What are the potential causes of OBDII code P0672 in a Chevrolet related to the Cylinder 2 Glow Plug Circuit Fault?

- The code P0672 can be caused by a faulty glow plug in cylinder 2, damaged wiring or connectors in the glow plug circuit, or a problem with the glow plug control module.

3. How can I diagnose the Cylinder 2 Glow Plug Circuit Fault indicated by OBDII code P0672 in my Chevrolet?

- To diagnose P0672, you can use a multimeter to test the resistance of the glow plug, check the wiring and connectors for any visible damage, and scan the glow plug control module for fault codes.

4. Can I drive my Chevrolet with OBDII code P0672 related to the Cylinder 2 Glow Plug Circuit Fault?

- It is not recommended to drive your vehicle with a glow plug circuit fault, as it can lead to starting issues and potential damage to the engine.

5. What are some repair tips for resolving OBDII code P0672 in a Chevrolet with a Cylinder 2 Glow Plug Circuit Fault?

- Repair tips include replacing the faulty glow plug in cylinder 2, repairing any damaged wiring or connectors, and resetting the fault code using an OBDII scanner.

6. How important is it to address OBDII code P0672 related to the Cylinder 2 Glow Plug Circuit Fault promptly?

- It is important to address P0672 promptly to prevent starting issues and further damage to the engine, as malfunctioning glow plugs can affect the combustion process.

7. Can weather conditions impact the occurrence of OBDII code P0672 in a Chevrolet related to the Cylinder 2 Glow Plug Circuit Fault?

- Yes, extreme cold weather conditions can put additional strain on glow plugs, increasing the likelihood of failures and triggering OBDII code P0672.

8. Are there any preventive measures to avoid OBDII code P0672 in a Chevrolet due to Cylinder 2 Glow Plug Circuit Fault?

- Regularly inspecting and maintaining the glow plug system, especially before the onset of cold weather, can help prevent issues leading to OBDII code P0672.

9. Is it possible for a DIY enthusiast to replace a glow plug in cylinder 2 to address OBDII code P0672 in a Chevrolet?

- While it is possible for a DIY enthusiast to replace a glow plug, it is recommended to have some experience with automotive repairs and access to the necessary tools to ensure proper installation.

10. How can a professional mechanic help in diagnosing and repairing OBDII code P0672 in a Chevrolet related to the Cylinder 2 Glow Plug Circuit Fault?

- A professional mechanic can efficiently diagnose the issue using specialized tools, accurately repair or replace faulty components, and ensure the glow plug circuit functions correctly to clear the fault code.