Alternative Fuel Tank Select Valve C Control Circuit High

Where it lives

For P2A9C, the valve sits on the circuit this code reports. The description of P2A9C reports a fault at the valve.

Check these first

• A short to voltage on the tank select valve C control wire
• An open in the ground leg of the tank select valve C solenoid
• A failed tank select valve C solenoid winding
• A driver inside the fuel control module stuck high on the tank select valve C output

What to do next

1. Scan all modules and save the tank select valve C freeze frame data
2. Inspect the tank select valve C connector and harness for chafing against a power source
3. Test the tank select valve C control wire for a short to voltage with the valve unplugged
4. Measure tank select valve C coil resistance and compare it to the opposite valve
5. Replace the tank select valve C if the wiring and coil tests are both clean
6. Clear the code and retest

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