P016D
Excessive Time To Enter Closed Loop Fuel Pressure Control
Generic OBD-II
Common symptoms
What you'll notice
- Check for any vacuum leaks in the intake system and repair them if found.
- Inspect and possibly replace the fuel pressure regulator if it is malfunctioning.
- Clean the fuel injectors to ensure proper fuel flow.
- Perform a throttle body cleaning to remove any carbon buildup that may be affecting fuel delivery.
- Finally, if all else fails, consider replacing the engine control module (ECM) if it is determined to be faulty.
Common causes
Most likely first
- Faulty oxygen sensor
- Clogged or dirty fuel injectors
- Malfunctioning mass airflow sensor
- Fuel pump failure
- Intake air leak
How to diagnose & fix
Work through it in order
- Engine misfires or stumbles
- Rough idle or stalling
- Decreased fuel efficiency
- Difficulty starting the vehicle
- Check engine light illuminated
Read & clear P016D yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.