Code Definition

P2797 — Auxiliary Transmission Oil Pump Driver

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P2797

P2797 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P2797 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Hybrid Control ECU or Transmission Control Module (TCM) monitors the operation of the auxiliary transmission oil pump driver, which is used to maintain hydraulic pressure when the engine is stopped, such as during hybrid EV operation or idle stop conditions. DTC P2797 is stored when the control module detects an abnormality in the pump driver circuit, such as a failure to operate the pump as commanded, an electrical malfunction in the driver circuit, or feedback indicating improper current or voltage during pump operation. This condition can compromise transmission lubrication or hydraulic...

Join TaT to view the complete code information and diagnostic details.

Quick Facts