P2A96 code meaning
Alternative Fuel Tank Select Valve B Control Circuit Performance
Powertrain system Generic code P2Axx codes Check engine light
What P2A96 means
P2A96 is about tank select valve B working electrically but not doing what it is told. In an LNG layout like the one in Westport's US8726785B2, where one pump draws from either of two vessels through an insulated select valve, the module can verify the switch from the pump's behaviour: right after selecting a full vessel, the drive work per stroke should be normal, whereas a reading that stays low suggests the pump still sits on the empty side. The same patent warns that low work can also come from a mechanical defect, so a plausible check compares readings before and after the command. Cold-stiffened seals, ice and debris can hold the valve back. No manufacturer publishes P2A96 or its test window.
P2A96 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1.5 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P2A96
- Malfunction lamp on
- Gas supply drops right after a tank change
- One vessel stays full while the other runs dry
Common causes of P2A96
- Most likelyValve B held by ice or cold-hardened seals
- PossibleDebris preventing valve B from shifting fully
- Less likelyPump defect interpreted as a select valve problem
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Alt fuel tank select valve bWiring harnessAfcm
What each part of P2A96 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. |
| 96 | The exact fault in that area. |
What to do next
- Note P2A96 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 P2A96
What does P2A96 mean?
P2A96 means "Alternative Fuel Tank Select Valve B Control Circuit Performance". P2A96 is about tank select valve B working electrically but not doing what it is told. It is a generic code, so it means the same on every make.
Is it safe to drive with P2A96?
Drive gently and only to a workshop. With P2A96 the car can go into limp mode (reduced power) to protect itself.
Will P2A96 fail an emissions test?
Yes, it can. P2A96 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 P2A96 to fix?
Difficulty: workshop only. A typical repair takes 1.5 to 5 hours of work. This is a job for a workshop.
Will P2A96 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.