P019F
Alternative Fuel Tank A Pressure Sensor Performance
Generic OBD-II
Common symptoms
What you'll notice
- Check and clean the fuel tank pressure sensor
- Inspect and replace damaged or faulty sensor wiring
- Verify and correct any issues with the fuel tank pressure sensor circuit
- Replace the alternative fuel tank pressure sensor if necessary
Common causes
Most likely first
- Faulty or malfunctioning alternative fuel tank A pressure sensor
- Clogged or blocked fuel lines leading to the alternative fuel tank A
- Fuel pump failure or malfunction in the alternative fuel tank A system
- Damaged or leaking alternative fuel tank A
- Improper installation or configuration of the alternative fuel tank A pressure sensor
How to diagnose & fix
Work through it in order
- Decreased fuel efficiency
- Engine misfires or hesitations
- Difficulty starting the vehicle
- Check engine light illuminates
- Foul odor from the exhaust
Read & clear P019F yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.