P2813 indicates a malfunction in the Pressure Control Solenoid G control circuit, specifically that the solenoid's performance is outside the expected range. The powertrain control module (PCM) has detected abnormal voltage or resistance values while commanding the solenoid.
The solenoid may be internally shorted, open, or mechanically stuck, preventing proper pressure regulation.
Corroded, cracked, or loose wires and connectors in the solenoid circuit can cause abnormal resistance or voltage readings.
Restrictions or leaks in the pressure control system reduce the solenoid's ability to achieve the commanded pressure.
A poor ground or supply voltage to the PCM can produce false readings, but this is less common than a component fault.
Rarely, the PCM itself may be unable to drive the solenoid correctly; this should be a last‑resort diagnosis after all other possibilities are eliminated.
Replacing the PCM is rarely needed for P2813. Most cases are due to a bad solenoid, wiring, or hydraulic issue. The PCM should only be replaced after exhaustive testing proves it is the cause.
P2813 will not clear on its own because it reflects a continuous performance problem. The underlying fault must be repaired and the code cleared with a scan tool.
You can usually drive short distances, but expect reduced power, possible stalling, and higher emissions. Prolonged driving may cause further damage to the pressure control system.
A multimeter for voltage and resistance checks and a scan tool capable of live data monitoring are sufficient for most diagnostics.