P2A94 code meaning
Alternative Fuel Tank Select Valve A Control Circuit High
Powertrain system Generic code P2Axx codes Check engine light
What P2A94 means
P2A94 reports a control voltage at tank select valve A above what the module expects for the commanded state. On a valve switched to ground by the module, an open coil or broken lead leaves the line floating at supply voltage; alternatively a chafed wire contacts a battery feed that the output stage cannot pull down. Either way, valve A does not respond to commands and stays wherever its spring or the foreign voltage holds it. In the staged two-supply strategy patented by Cespira, the controller then cannot move to the second supply when the first falls below its threshold, or cannot leave it. Range shrinks or the engine falls back to its other fuel. No maker publishes P2A94. Check coil resistance, then the harness to the valve.
P2A94 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2A94
- Malfunction lamp on
- No change to the next tank, gas runs out early
- Engine switches to its other fuel or reduced power
Common causes of P2A94
- Most likelyOpen coil or broken lead on a ground-switched valve A
- PossibleControl wire of valve A touching a battery feed
- Less likelyCorroded pins with high resistance at valve A
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 aWiring harnessAfcm
What each part of P2A94 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. |
| 94 | The exact fault in that area. |
What to do next
- Note P2A94 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 P2A94
What does P2A94 mean?
P2A94 means "Alternative Fuel Tank Select Valve A Control Circuit High". P2A94 reports a control voltage at tank select valve A above what the module expects for the commanded state. It is a generic code, so it means the same on every make.
Is it safe to drive with P2A94?
Drive gently and only to a workshop. With P2A94 the car can go into limp mode (reduced power) to protect itself.
Will P2A94 fail an emissions test?
Yes, it can. P2A94 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 P2A94 to fix?
Difficulty: hard. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P2A94 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.