P2A22

Alternative Fuel Tank Shutoff Valve B Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine Light Is On
Problems starting an engine on alternative fuel
The car switches to gasoline while the engine is running
Loss of power when running on alternative fuel
Unstable operation of the engine using alternative fuel

Causes

Broken wire in the valve control circuit
Malfunction of the shut-off valve itself
Problems with the relay or circuit fuse
Short circuit in wiring harness
Engine control unit (ECU) malfunction

How to Fix

Check the integrity of the wires in the control circuit
Check fuses and relays associated with the system
Test the resistance of the shut-off valve
Check the presence of power and ground at the valve connector
If necessary, replace the fuel shut-off valve

Related codes

P2A21 P2A23 P2A24