P0675 Fault Code

Cylinder 5 Glow Plug Circuit

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0675 fault code indicates an issue with the glow plug circuit for Cylinder 5. This circuit is crucial for preheating the combustion chamber in diesel engines, especially during cold starts. A malfunctioning glow plug can lead to poor engine performance, increased emissions, and difficulty starting the vehicle during low temperatures. It's important to address any glow plug issues to maintain optimal engine operation.

What are the symptoms of the P0675 code?

Drivers may notice several symptoms when the P0675 code is triggered:

• Difficulty starting the engine, particularly in cold weather
• Misfiring or rough idling when the engine is running
• Reduced fuel efficiency
• Increased exhaust emissions
• An illuminated check engine light on the dashboard

What causes the P0675 code?

The causes of the P0675 fault code may include:

• A faulty glow plug in Cylinder 5
• Damaged wiring or connectors in the glow plug circuit
• A malfunctioning glow plug relay
• Issues with the engine control module (ECM) affecting the glow plug operation
• Corrosion or poor connections in the electrical system related to the glow plugs

How to fix P0675?

To resolve the P0675 fault code, follow these steps:

1. Use a diagnostic scanner to confirm the P0675 code and check for additional codes that may indicate other issues.
2. Inspect the glow plug in Cylinder 5 for damage or testing it for continuity to ensure it is functioning properly.
3. Check the wiring and connectors related to the glow plug circuit for any signs of damage or corrosion.
4. Test the glow plug relay for proper operation and replace it if necessary.
5. Clear the fault code and perform a test drive to see if the issue returns. If it does, further diagnosis may be needed for the ECM or other components.