Engine-CodesGMC – P0675 2014 GMC Sierra

P0675 2014 GMC Sierra Code - Cylinder 5 Glow Plug Circuit Fault

Quick Answer

The P0675 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a fault in the glow plug circuit for cylinder 5. Common causes include A faulty glow plug in cylinder 5, Damaged or corroded wiring in the glow plug circuit, A 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
P0675 2014 GMC Sierra indicates Cylinder 5 Glow Plug Circuit Fault.
Common causes
Common causes include A faulty glow plug in cylinder 5, Damaged or corroded wiring in the glow plug circuit, A 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.
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P0675 2014 GMC Sierra Description

The P0675 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a fault in the glow plug circuit for cylinder 5. Glow plugs are essential components in diesel engines that help with cold starting by heating the combustion chamber to facilitate ignition. In this case, the code specifically points to an issue with the glow plug circuit for cylinder 5, which can lead to difficulties starting the engine, reduced performance, and potential long-term damage if left unresolved.

OBDII Code P0675 2014 GMC Sierra - Cylinder 5 Glow Plug Circuit Fault
P0675 2014 GMC Sierra Code - Cylinder 5 Glow Plug Circuit Fault

Common Causes of P0675 2014 GMC Sierra

  1. A faulty glow plug in cylinder 5.
  2. Damaged or corroded wiring in the glow plug circuit.
  3. A malfunctioning glow plug control module.
  4. Poor electrical connections in the circuit.
  5. Water or debris intrusion affecting the glow plug circuit.

Symptoms of P0675 2014 GMC Sierra

  1. Difficulties starting the engine, especially in cold weather.
  2. Rough idling or a noticeable decrease in engine performance.
  3. Misfires or hesitation during acceleration.
  4. Reduced fuel efficiency.
  5. Engine stalling, particularly when idling or at low speeds.

How to Fix P0675 2014 GMC Sierra

  1. Begin by diagnosing the exact cause of the issue using a scan tool to confirm the P0675 code and pinpoint the specific component causing the fault.
  2. Inspect the glow plug in cylinder 5 for any signs of damage or wear, replacing it if necessary.
  3. Check the wiring and connections in the glow plug circuit for any corrosion, breaks, or loose connections, repairing or replacing as needed.
  4. Test the glow plug control module to ensure it is functioning correctly, replacing it if it is found to be faulty.
  5. Clear the DTC from the vehicle's computer after completing the repairs and test the vehicle to ensure the issue has been resolved.

Cost to Fix P0675 2014 GMC Sierra

The typical repair costs for addressing a cylinder 5 glow plug circuit fault in a 2014 GMC Sierra can range from $150 to $400, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate, as rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. Keep in mind that addressing this issue promptly can prevent further damage and ensure the vehicle's optimal performance.

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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.

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