P01A0
Alternative Fuel Tank A Pressure Sensor Circuit Low
Generic OBD-II
Real-world scan data
Seen in
84
scans in the past year
Found in
<0.1%
of scans
<0.1%
of scans that found faults
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Check the wiring and connections related to the alternative fuel tank A pressure sensor circuit
- Inspect the alternative fuel tank A pressure sensor for any damage or malfunction
- Replace the alternative fuel tank A pressure sensor if necessary
- Check for any blockages or clogs in the fuel lines leading to the alternative fuel tank A
- Verify that the alternative fuel tank A pressure sensor is receiving the correct voltage signal
Common causes
Most likely first
- Faulty or malfunctioning alternative fuel tank pressure sensor
- Loose or damaged wiring/connectors in the alternative fuel tank pressure sensor circuit
- Clogged or restricted fuel lines leading to the alternative fuel tank
- Issues with the fuel tank venting system causing abnormal pressure readings
- Malfunctioning engine control module (ECM) or powertrain control module (PCM) affecting the sensor circuit.
How to diagnose & fix
Work through it in order
- Check engine light illuminated
- Decreased engine performance or power
- Stalling or rough idling
- Difficulty starting the vehicle
- Increased fuel consumption
Read & clear P01A0 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.