Detailed Description of Error P068E

OBDII error code P068E indicates a problem with the glow plug control circuit for cylinder 8. In diesel engines, glow plugs are used to assist in the combustion process during cold starts. The glow plug control module supplies power to the glow plugs, and the engine control module (ECM) monitors the voltage in the circuit. If the ECM detects a low voltage in the cylinder 8 glow plug control circuit, it will set code P068E.

This error code is specific to diesel engines and is not applicable to gasoline engines. The error code may be accompanied by other symptoms such as difficulty starting the engine, rough idling, or decreased engine performance.

Possible Causes of Error P068E

• Faulty glow plug control module
• Faulty glow plug in cylinder 8
• Corrosion or damage to the wiring or connectors in the glow plug control circuit
• Low battery voltage
• Faulty engine control module (ECM)
• Incorrect glow plug installation or replacement
• Faulty fuel injector in cylinder 8
• Clogged fuel filter or restricted fuel supply

Possible Fixes for Error P068E

1. Check the battery voltage and charging system to ensure proper operation
2. Inspect the wiring and connectors in the glow plug control circuit for damage or corrosion and repair as needed
3. Replace the glow plug in cylinder 8 if faulty
4. Replace the glow plug control module if faulty
5. Check the fuel system for blockages or restrictions and clean or replace as needed
6. Use a scan tool to monitor the glow plug control circuit voltage and identify the source of the problem
7. Consult a professional mechanic if the problem persists after attempting the above fixes