Cylinder 12 Glow Plug Control Circuit Low

Common symptoms

What you'll notice

• Check the glow plug wiring and connections for any damages or loose connections
• Test the glow plug control module for proper functionality and replace if necessary
• Inspect the glow plugs themselves for any signs of damage or wear and replace if necessary
• Check the engine control module (ECM) for any related faults or errors and address them accordingly
• Perform a thorough diagnostic scan of the vehicle to detect any other potential issues that may be affecting the glow plug control circuit.

Common causes

Most likely first

1. Faulty cylinder 12 glow plug
2. Loose or corroded electrical connections in the cylinder 12 glow plug circuit
3. Faulty glow plug control module
4. Shorted or open glow plug circuit wiring
5. Engine control unit (ECU) malfunction.

How to diagnose & fix

Work through it in order

1. Hard starting or difficult ignition
2. Hesitation or loss of power during acceleration
3. Increased fuel consumption
4. Rough idle or misfiring
5. Check engine light illuminated