P2A73: Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit High — what it means, the affected system and what to check before replacing parts.
Meaning, symptoms, causes and checks
Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit High. Basic catalogue definition; diagnostic details have not yet been reviewed.
Affected system: Powertrain
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: P2A73-00, P2A7300 (some scan tools add the fault-type byte, e.g. -00).