P0681 Cylinder 11 Glow Plug Circuit Fault

OBD2 Code: P0681

Description: Cylinder 11 glow plug circuit fault.

Definition: The OBD2 code P0681 indicates a malfunction in the glow plug circuit of cylinder 11. This could be due to issues such as a faulty glow plug, wiring problems, or a defective control module affecting the operation of the glow plug system for that specific cylinder.

p0681 – Cylinder 11 Glow Plug Circuit Fault

Typical Severity: Moderate

Common Causes

p0681 – Cylinder 11 Glow Plug Circuit Fault

Common causes:

• Faulty glow plug in cylinder 11
• Wiring issues in the glow plug circuit for cylinder 11
• Defective glow plug control module
• Poor electrical connection related to the glow plug circuit in cylinder 11

 

Common Misdiagnosis

OBD2 Code: P0681

Description: Cylinder 11 Glow Plug Circuit Fault

Common Misdiagnosis: Replacing the glow plug without checking the wiring or control module, assuming a faulty glow plug when the issue may be with the relay or fuse.

 

Common Diagnostic Steps

OBD2 Code: P0681

Description: Cylinder 11 Glow Plug Circuit Fault

• Check the glow plug for cylinder 11 for continuity and resistance. Replace if necessary.
• Inspect the wiring harness and connectors for damage, corrosion, or loose connections. Repair or replace as needed.
• Test the glow plug relay and control module for proper operation. Replace if faulty.
• Verify that the battery voltage is within specification to ensure adequate power supply to the glow plug circuit.
• Clear the code and perform a test drive to see if it returns after repairs are made.