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DTC codes / P2Axx · Hybrid propulsion / P2A85
P2A85 indicates that the powertrain control module has detected a low-voltage condition on the control circuit for the compression stroke valve of alternative fuel pump B. The circuit is expected to carry a specific voltage when the valve is commanded, and the module sees a value below the acceptable threshold, which points to a short to ground, an open circuit, or a faulty valve actuator.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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