P2A5FAlternative Fuel Tank B Level Sensor Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- How the content of a second gas tank is measured depends on the fuel. CNG has no liquid surface, so the level is worked out from pressure, often corrected by tank temperature; GM's 2015 Impala Bi-Fuel shows full near 3,600 psi and empty near 400 psi. LPG, being liquid, allows a float whose magnet passes its position through the tank wall to a Hall element, as in Rochester's R3D dials. P2A5F is the general circuit fault of such a sender on tank B, without a low or high finding. No manufacturer documents P2A5F. Roush's propane trucks with two tanks use the petrol codes P2067 and P2068 for the second sender instead, and the gauge then shows only the primary tank. Start with plug, wiring and supply of the tank B sender.
- What you may notice
- Check engine light
- Gauge ignores the content of tank B
- Range estimate on gas too low
- Likely causes
- LikelyPlug or wiring of the tank B sender faulty
- PossibleTank B level sender or Hall module defective
- RareReading module or data link to the engine module disturbed
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.