Cold Start Fuel Injection Control Circuit Low

Common symptoms

What you'll notice

• Check the fuel injectors for any clogs or blockages
• Inspect the cold start valve for any malfunctions or damage
• Verify the fuel pressure and ensure it is within the recommended range
• Check the wiring and connections in the cold start fuel injection circuit for any loose or damaged components
• If all else fails, consider replacing the engine control module (ECM) to fix the issue

Common causes

Most likely first

1. Malfunctioning cold start fuel injector
2. Faulty fuel injectors wiring harness
3. Defective engine coolant temperature sensor
4. Issue with the engine control module (ECM)
5. Low fuel pressure

How to diagnose & fix

Work through it in order

1. Difficulty starting the engine when the vehicle is cold
2. Poor fuel economy
3. Stalling or hesitation during acceleration
4. Rough idle or uneven engine revs
5. Illumination of the check engine light