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Engine-Codes – Generic – P0675

P0675 Code - Cylinder 5 Glow Plug Circuit Fault

Quick Answer

The diagnostic trouble code P0675 indicates a fault in the glow plug circuit of cylinder 5 in a diesel engine. Common causes include Faulty glow plug in cylinder 5, Damaged wiring or connectors in the glow plug circuit, Malfunctioning ECM or 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 indicates Cylinder 5 Glow Plug Circuit Fault.
Common causes
Common causes include Faulty glow plug in cylinder 5, Damaged wiring or connectors in the glow plug circuit, Malfunctioning ECM or 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 13, 2024
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Code P0675 Description

The diagnostic trouble code P0675 indicates a fault in the glow plug circuit of cylinder 5 in a diesel engine. Glow plugs are essential components in diesel engines, especially during cold starts, as they heat up the combustion chamber to aid in the ignition of the fuel. When the engine control module (ECM) detects a fault in the glow plug circuit of cylinder 5, it means that there is an issue with the electrical system responsible for heating up the glow plug in that specific cylinder.

OBDII Code P0675 - Cylinder 5 Glow Plug Circuit Fault
P0675 Code - Cylinder 5 Glow Plug Circuit Fault

Common Causes of P0675

  1. Faulty glow plug in cylinder 5.
  2. Damaged wiring or connectors in the glow plug circuit.
  3. Malfunctioning ECM or control module.
  4. Blown fuse or faulty relay in the glow plug circuit.
  5. Corrosion or poor connections in the electrical system.

Symptoms of P0675

  1. Difficulty starting the engine, especially in cold weather.
  2. Rough idling or misfiring of the engine.
  3. Decreased fuel efficiency.
  4. Increased exhaust emissions.
  5. Illumination of the check engine light on the dashboard.

How to Fix P0675

  1. Begin by diagnosing the specific cause of the fault using a diagnostic scanner to confirm the P0675 code.
  2. Inspect the glow plug in cylinder 5 for any signs of damage or wear and replace if necessary.
  3. Check the wiring and connectors in the glow plug circuit for any breaks, corrosion, or loose connections, repairing or replacing as needed.
  4. Test the ECM and related components for proper functionality, replacing any faulty parts.
  5. Clear the trouble code from the ECM's memory and test the vehicle to ensure the issue has been resolved.

Cost to Fix P0675

The cost of repairing a cylinder 5 glow plug circuit fault can vary depending on the specific cause of the issue and the labor rates in your area. On average, replacing a glow plug can cost between $50 and $150 per plug, while diagnosing and repairing wiring or ECM issues can range from $100 to $500 or more. Overall, the total repair cost for this issue could range from $200 to $800 or higher, including parts and labor. It's recommended to consult with a trusted mechanic or repair shop for a more accurate estimate based on your vehicle's make and model.

What does this mean?

Tech Notes for P0675

















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When is the Code Detected?

The Engine Control Module (ECM) has detected a fault in the cylinder #5 glow plug circuit

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Code P0675 Information for Specific Makes

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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