P2A3EAlternative Fuel Delivery Error
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2A3E is the alternative fuel version of P0148: the system cannot supply the gas or propane quantity the engine asks for. Ford had already defined its own code P1048 with this wording, listed with a lamp in the 2014 Boss 302S OBD table. Roush CleanTech's liquid propane system on Ford trucks shows how a delivery error is judged, there still under P0148: the pump voltage has climbed to its adaptive maximum while fuel trims run lean. Roush names a clogged filter, a tripped excess-flow valve, a closed tank or rail supply solenoid and a partly closed manual valve, and calls that code non-MIL. GM's 2015 bi-fuel Impala switches to the other fuel when one supply fails. No public source uses P2A3E itself; drivers mainly notice hesitation and a change to petrol.
- What you may notice
- Hesitation or stalling on gas
- Automatic switch to petrol
- Lean fuel trim codes stored as well
- Warning lamp depending on manufacturer
- Likely causes
- LikelyGas or propane filter heavily restricted
- PossibleTank solenoid, rail solenoid or manual valve not fully open
- PossibleExcess-flow valve on the tank tripped
- PossibleWeak propane pump or pressure regulator not holding pressure
- RareTank pressure too low because the tank is nearly empty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.