P054E
Idle Control System Fuel Quantity Lower Than Expected
Generic OBD-II
Common symptoms
What you'll notice
- Check and clean the throttle body and idle control valve
- Replace the fuel filter to improve fuel flow
- Inspect and replace faulty fuel injectors
- Verify and adjust the fuel pressure regulator if necessary
Common causes
Most likely first
- Malfunctioning idle air control valve
- Clogged fuel injectors
- Faulty fuel pressure regulator
- Vacuum leak in the intake manifold or hoses
- Dirty or faulty mass air flow sensor
How to diagnose & fix
Work through it in order
- Rough or erratic idling
- Stalling or difficulty starting the vehicle
- Reduced engine power or acceleration
- Poor fuel economy
- Illumination of the check engine light
Read & clear P054E yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.