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P0675 2018 Chevrolet Silverado Code - Cylinder 5 Glow Plug Circuit Fault

Quick Answer

The P0675 diagnostic trouble code (DTC) specifically pertains to a fault in the glow plug circuit for cylinder 5 in a 2018 Chevrolet Silverado. Common causes include Faulty glow plug in cylinder 5, Wiring or electrical connection issues in the glow plug circuit, Corrosion or damage to the electrical contacts. 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 2018 Chevrolet Silverado indicates Cylinder 5 Glow Plug Circuit Fault.
Common causes
Common causes include Faulty glow plug in cylinder 5, Wiring or electrical connection issues in the glow plug circuit, Corrosion or damage to the electrical contacts.
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 Aug 19, 2024
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Code P0675 2018 Chevrolet Silverado Description

The P0675 diagnostic trouble code (DTC) specifically pertains to a fault in the glow plug circuit for cylinder 5 in a 2018 Chevrolet Silverado. Glow plugs are crucial components in diesel engines, especially during cold starts, as they heat up the combustion chamber to facilitate smooth ignition and combustion. When the engine control module (ECM) detects a fault in the glow plug circuit for cylinder 5, it indicates a potential issue with the heating element or the electrical connection, which can lead to difficulties in starting the engine, reduced performance, increased emissions, and potential engine damage if left unresolved.

OBDII Code P0675 2018 Chevrolet Silverado - Cylinder 5 Glow Plug Circuit Fault
P0675 2018 Chevrolet Silverado Code - Cylinder 5 Glow Plug Circuit Fault

Common Causes of P0675 2018 Chevrolet Silverado

  1. Faulty glow plug in cylinder 5.
  2. Wiring or electrical connection issues in the glow plug circuit.
  3. Corrosion or damage to the electrical contacts.
  4. Faulty ECM or control module.
  5. Poor quality diesel fuel or contaminated fuel affecting the glow plug operation.

Symptoms of P0675 2018 Chevrolet Silverado

  1. Hard starting or difficulty starting the vehicle, especially in cold weather.
  2. Rough idling or misfiring of the engine.
  3. Reduced engine power and acceleration.
  4. Increased exhaust smoke, particularly white or black smoke.
  5. Illumination of the check engine light on the dashboard.

How to Fix P0675 2018 Chevrolet Silverado

  1. Begin by diagnosing the specific issue with the glow plug circuit for cylinder 5 using a diagnostic scanner to confirm the fault code.
  2. Inspect the glow plug in cylinder 5 for any signs of damage or failure and replace if necessary.
  3. Check the wiring and electrical connections in the glow plug circuit for any corrosion, loose connections, or damage, and repair or replace as needed.
  4. Test the glow plug circuit to ensure proper operation and functioning.
  5. Clear the fault code from the ECM memory and perform a test drive to confirm that the issue has been resolved.

Cost to Fix P0675 2018 Chevrolet Silverado

The typical repair costs for addressing a cylinder 5 glow plug circuit fault in a 2018 Chevrolet Silverado may range from $150 to $300, including parts and labor. However, the actual cost can vary depending on the extent of the issue, the quality of replacement parts used, and the labor rates charged by the repair shop. It is advisable to consult with a trusted mechanic or auto repair shop to get an accurate estimate based on the specific circumstances of the vehicle in question.

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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 P0675 2018 Chevrolet Silverado Code

1. What does the OBDII code P0675 mean on a 2018 Chevrolet Silverado?

P0675 indicates a fault in the glow plug circuit for cylinder 5, which can impact cold engine starting performance.

2. What are the common symptoms of P0675 on a 2018 Chevrolet Silverado?

Symptoms may include difficulty starting the engine in cold weather, rough idle, reduced fuel efficiency, or the check engine light turning on.

3. What causes the P0675 code to appear?

Common causes include a faulty glow plug in cylinder 5, damaged wiring or connectors in the glow plug circuit, or a malfunctioning glow plug control module.

4. Can I drive my 2018 Chevrolet Silverado with a P0675 code?

While the truck may still run, driving with this code can lead to starting issues in colder temperatures and should be addressed promptly to avoid further damage.

5. How do I diagnose the P0675 code on my Silverado?

Diagnose by using an OBDII scanner to confirm the code, inspecting the glow plug for cylinder 5, checking the wiring and connectors, and testing the glow plug control module.

6. How do I fix the P0675 code on a 2018 Chevrolet Silverado?

Repairs may include replacing the faulty glow plug, repairing damaged wiring or connectors, or replacing the glow plug control module if it’s malfunctioning.

7. How much does it cost to fix a P0675 code on a Silverado?

Replacing a glow plug typically costs $50–$150 for parts and labor, while more extensive repairs like wiring fixes or module replacement can cost $200–$500 or more.

8. Can a faulty glow plug cause long-term damage to my engine?

A faulty glow plug itself won’t typically cause long-term damage, but prolonged starting issues can strain the battery and starter or lead to incomplete combustion.

9. What tools do I need to diagnose and repair the P0675 code?

You’ll need an OBDII scanner, a multimeter to test electrical connections, and basic hand tools like a socket set to replace the glow plug.

10. Is P0675 specific to cylinder 5 on the 2018 Silverado?

Yes, the P0675 code specifically refers to a fault in the glow plug circuit for cylinder 5, while other similar codes (e.g., P0671–P0678) correspond to other cylinders.

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