What it means
The control module monitors whether tank select valve A responds as commanded to select the alternative fuel tank. It sets this code when the valve’s operation does not match the expected response.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
- The engine or gearbox may go into limp mode
How it works
Alternative fuel tank select valve A moves fuel routing to the commanded tank. The control module checks whether valve A responds as expected and sets P2A92 when its operation does not match the command, such as when it sticks or cannot move with adequate force.
Common causes
Most likely first.
- Valve stuck in last commanded position
- Coil force degraded
Symptoms
- Check-engine or alternative-fuel system warning light, if equipped
- Difficulty switching fuel tanks
- Loss of power or stalling
How to diagnose it
- Record freeze-frame data and review tank-selection commands and status data to confirm the fault involves valve A's response.
- Inspect valve A and its linkage or mounting for damage, contamination, or anything that could prevent movement.
- Check the valve A connector and wiring for poor connections that could weaken its actuation.
- Command valve A with a scan tool, if supported, and observe whether its position or fuel-routing status changes.
- If it fails to respond, test valve A's coil and actuation against the manufacturer's specification before replacing it.
Common fixes
- Remove an obstruction or correct a binding linkage that prevents valve A from moving.
- Repair a loose, corroded, or damaged electrical connection at valve A.
- Replace valve A if it sticks or cannot develop adequate actuation force despite a sound circuit.
- Clear the code and confirm valve A completes a tank-selection command.
Can I keep driving?
Limit driving if tank selection is unreliable, and avoid routes where stalling would create a hazard. A valve that fails to change position can cause loss of power or leave the engine without the selected fuel supply.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.