P01A3: The alternative fuel rail pressure sensor has an electrical fault
The alternative fuel rail pressure sensor has an electrical fault. It may be the part itself, its connector or the wiring.
| Code | P01A3 |
|---|---|
| System | Engine and transmission |
| Group | P01xx, Air and fuel metering |
| Type | Generic: it means the same on every make |
How to read and clear P01A3 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P01A3 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P019F The alternative fuel tank A pressure sensor gives readings outside the normal
- P01A0 The alternative fuel tank A pressure sensor gives a lower signal than normal
- P01A1 The alternative fuel tank A pressure sensor gives a higher signal than normal
- P01A2 The alternative fuel tank A pressure sensor fails now and then
- P01A4 The alternative fuel rail pressure sensor gives readings outside the normal
- P01A5 The alternative fuel rail pressure sensor gives a lower signal than normal
- P01A6 The alternative fuel rail pressure sensor gives a higher signal than normal
- P01A7 The alternative fuel rail pressure sensor fails now and then
- P0100 Mass or volume air flow sensor circuit fault
- P0101 Air flow sensor range or performance problem
- P0102 Air flow sensor circuit low input
- P0103 Air flow sensor circuit high input
What does code P01A3 mean?
The alternative fuel rail pressure sensor has an electrical fault. It may be the part itself, its connector or the wiring.
How do you clear P01A3?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P01A3 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
