P2A3E code meaning
Alternative Fuel Delivery Error
Powertrain system Generic code P2Axx codes Check engine light
What P2A3E means
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 gasoline.
P2A3E at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of P2A3E
- Hesitation or stalling on gas
- Automatic switch to gasoline
- Lean fuel trim codes stored as well
- Warning lamp depending on manufacturer
Common causes of P2A3E
- Most 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
- Less likelyTank pressure too low because the tank is nearly empty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Alt fuel pumpAlt fuel injectorsGas pressure regulatorAfcm
What each part of P2A3E means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| A | Area: hybrid propulsion. |
| 3E | The exact fault in that area. |
What to do next
- Note P2A3E and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2A3E
What does P2A3E mean?
P2A3E means "Alternative Fuel Delivery Error". P2A3E is the alternative fuel version of P0148: the system cannot supply the gas or propane quantity the engine asks for. It is a generic code, so it means the same on every make.
Is it safe to drive with P2A3E?
Drive gently and only to a workshop. With P2A3E the car can go into limp mode (reduced power) to protect itself.
Will P2A3E fail an emissions test?
Yes, it can. P2A3E is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2A3E to fix?
Difficulty: hard. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P2A3E clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.