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P0672 2015 Chevrolet Silverado Code - Cylinder 2 Glow Plug Circuit Fault

Quick Answer

The diagnostic trouble code P0672 for a 2015 Chevrolet Silverado indicates a fault in the glow plug circuit of cylinder 2. Common causes include Faulty glow plug in cylinder 2, Damaged wiring or connectors in the glow plug circuit, Malfunctioning glow plug control module. 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 2015 Chevrolet Silverado indicates Cylinder 2 Glow Plug Circuit Fault.
Common causes
Common causes include Faulty glow plug in cylinder 2, Damaged wiring or connectors in the glow plug circuit, Malfunctioning glow plug control module.
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 25, 2024
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Code P0672 2015 Chevrolet Silverado Description

The diagnostic trouble code P0672 for a 2015 Chevrolet Silverado indicates a fault in the glow plug circuit of cylinder 2. Glow plugs are essential components in diesel engines, as they heat the combustion chamber to facilitate cold starts. When the engine is cold, the glow plugs heat up to ensure proper ignition of the fuel-air mixture. In this case, a fault in the circuit of the glow plug for cylinder 2 means that the plug is not receiving the necessary power or is not functioning correctly.

OBDII Code P0672 2015 Chevrolet Silverado - Cylinder 2 Glow Plug Circuit Fault
P0672 2015 Chevrolet Silverado Code - Cylinder 2 Glow Plug Circuit Fault

Common Causes of P0672 2015 Chevrolet Silverado

  1. Faulty glow plug in cylinder 2.
  2. Damaged wiring or connectors in the glow plug circuit.
  3. Malfunctioning glow plug control module.
  4. Issues with the engine control module (ECM).
  5. Corrosion or poor connections in the glow plug system.

Symptoms of P0672 2015 Chevrolet Silverado

  1. Difficulty starting the engine, especially in cold weather.
  2. Extended cranking before the engine starts.
  3. Rough idling or misfires.
  4. Decreased fuel efficiency.
  5. Increased emissions.

How to Fix P0672 2015 Chevrolet Silverado

  1. Begin by diagnosing the specific cause of the fault using a diagnostic scanner to pinpoint the issue.
  2. Inspect the glow plug in cylinder 2 to determine if it is faulty and needs replacement.
  3. Check the wiring and connectors in the glow plug circuit for any damage or corrosion, repairing or replacing as necessary.
  4. Test the glow plug control module and ECM for proper functioning, replacing if found to be faulty.
  5. Clear the diagnostic trouble code from the vehicle's system and test the vehicle to ensure the issue has been resolved.

Cost to Fix P0672 2015 Chevrolet Silverado

The typical repair costs for addressing a cylinder 2 glow plug circuit fault in a 2015 Chevrolet Silverado can vary depending on the specific cause of the issue. Replacement glow plugs can range from $20 to $50 each, with labor costs varying based on the shop's hourly rates. Overall, the total repair cost for this issue could range from $100 to $300, including parts and labor. It's important to note that diagnosis time and labor rates can vary, so it's advisable to check with local auto repair shops for a more accurate estimate.

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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 2015 Chevrolet Silverado Code

1. What does the OBDII code P0672 mean on a 2015 Chevrolet Silverado?

P0672 indicates a Cylinder 2 Glow Plug Circuit Fault, meaning the engine control module (ECM) has detected an issue in the glow plug circuit for cylinder 2.

2. What are the common symptoms of the P0672 code in a Silverado?

Symptoms may include difficulty starting in cold weather, reduced engine performance, increased exhaust smoke, and an illuminated check engine light.

3. What causes the P0672 code on a 2015 Chevrolet Silverado?

Common causes include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, a failed glow plug control module, or corrosion in the electrical connections.

4. How can I diagnose the P0672 code on my Silverado?

Start by inspecting the wiring and connectors for cylinder 2's glow plug. Use a multimeter to test the glow plug’s resistance and verify power and ground at the connector. Check the glow plug control module for proper operation.

5. Can I drive my Silverado with the P0672 code?

While it’s possible to drive with this code, prolonged operation without fixing the issue can lead to harder cold starts and potential damage to other components over time.

6. How do I fix the P0672 code on a 2015 Silverado?

Repairs may include replacing the defective glow plug, repairing or replacing damaged wiring or connectors, or replacing the glow plug control module if necessary.

7. What tools are needed to repair the P0672 code?

You may need a multimeter to test the glow plug circuit, basic hand tools to replace the glow plug, and an OBDII scanner to clear the code after repairs.

8. How much does it cost to fix the P0672 code on a Silverado?

The cost varies depending on the issue. A glow plug typically costs $20–$50, while labor costs for replacing it can range from $100–$200.

9. Can a faulty glow plug cause engine damage in my Silverado?

A faulty glow plug itself doesn’t usually cause engine damage, but if left unaddressed, it can lead to poor combustion, increased soot buildup, and stress on other components.

10. How do I prevent the P0672 code from recurring?

Regularly inspect and maintain the glow plug system, replace glow plugs as part of scheduled maintenance, and address wiring or connector issues promptly to prevent recurrence.

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