Glow Plug Control Module 1 Performance

Common symptoms

What you'll notice

• Check the glow plugs for any sign of damage or wear and replace if necessary.
• Inspect the wiring and connections to the glow plug control module for any loose or damaged components and repair or replace as needed.
• Update the software of the glow plug control module to ensure compatibility with the vehicle's system.
• Test the glow plug control module using a diagnostic tool to identify any malfunctions or errors and repair or replace it if necessary.
• Ensure the battery voltage is sufficient and in good condition, as low voltage can affect the performance of the glow plug control module.

Common causes

Most likely first

1. Faulty glow plug control module
2. Loose or corroded electrical connections to the glow plug control module
3. Malfunctioning glow plugs
4. Faulty control unit
5. Low battery voltage

How to diagnose & fix

Work through it in order

1. Engine misfires or runs rough
2. Poor fuel economy
3. Difficult or slow starting
4. Illuminated Check Engine Light
5. Increased emissions