P06C8 Cylinder 4 Glow Plug Incorrect

OBD2 Code: P06C8

Description: Cylinder 4 Glow Plug Incorrect

Definition: This code indicates that there is an issue with the glow plug circuit for cylinder 4. The Engine Control Module (ECM) has detected a problem with the operation or performance of the glow plug in this specific cylinder, which may affect starting and running conditions, especially in cold weather.

p06c8 – Cylinder 4 Glow Plug Incorrect

Typical Severity: Moderate

Common Causes

p06c8 – Cylinder 4 Glow Plug Incorrect

Common causes:

• Faulty glow plug in cylinder 4
• Wiring issues related to the glow plug circuit
• Defective glow plug control module
• Issues with the engine control module (ECM)

 

Common Misdiagnosis

OBD2 Code: P06C8

Description: Cylinder 4 Glow Plug Incorrect

Common Misdiagnosis: Replacing the glow plug without checking the wiring or control module.

 

Common Diagnostic Steps

OBD2 Code: P06C8

Description: Cylinder 4 Glow Plug Incorrect

• Check the glow plug for cylinder 4 for physical damage or wear.
• Test the resistance of the glow plug using a multimeter to ensure it is within manufacturer specifications.
• Inspect the wiring and connectors leading to cylinder 4’s glow plug for any signs of corrosion, damage, or loose connections.
• Verify that the power supply to the glow plug is functioning correctly by checking voltage levels with a multimeter.
• Examine the glow plug control module for faults or malfunctions that could affect cylinder 4’s operation.
• If applicable, update the vehicle’s engine control unit (ECU) software to address any known issues related to this code.
• Clear the code and perform a test drive to see if it returns after completing repairs or replacements.