P224C — Alternative-fuel tank shutoff valve A control circuit — circuit fault/open

P224C concerns alternative-fuel tank shutoff valve A control circuit. The fault label concerns the electrical circuit and includes an open-circuit condition; it does not identify the failed part. The code identifies an electrical control circuit for the tank shutoff valve. It does not specify the fuel type or establish a leak.

Affected system: Alternative-fuel supply and injection

Symptoms

• Warning light may illuminate
• Related system function may be impaired
• Vehicle-specific symptoms vary

Possible causes

• Fuel supply or pressure issue, restricted injector, actuator fault, connector or wiring damage
• Related wiring, connector, power or ground fault
• Vehicle-specific mechanical or control issue

What to check

• Record stored and pending codes and freeze-frame data
• Check fuel supply and pressure readings, electrical supply and ground, and the relevant injector or regulator circuit before replacing parts.
• Confirm measured values against the vehicle service information
• Retest under the conditions that set the code
• Check fuel supply and pressure readings, electrical supply and ground, and the relevant injector or regulator circuit before replacing parts.
• Repair the verified cause and confirm the code does not return

Also written as: P224C-00, P224C00 (some scan tools add the fault-type byte, e.g. -00).