What does code P2A73 mean?

DTC codes / P2Axx · Hybrid propulsion / P2A73

P2A73Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit High

P2A73 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the hydraulic fuel pump select valve, which is used on alternative-fuel vehicles to switch between fuel sources. The PCM commands the valve by providing a ground path, and when the circuit voltage stays above the expected threshold, the PCM sets this code because it cannot reliably control the valve.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.