P06DA: oil-pressure control open circuit is an electrical monitor

P06DA checks the oil-pump control low-side driver for an open circuit in the cited ECM strategy. The controller evaluates the output while it is off and judges its voltage against controller-specific limits.

Separate circuit integrity from oil pressure

The open-circuit detection specification corresponds to more than 200 kilohms between output and controller ground. This describes electrical fault detection; the row does not compare measured oil pressure with a mechanical minimum. P06DA alone therefore cannot establish a pressure value or diagnose a worn pump.

The enabling conditions require powertrain relay voltage above 11 volts, run/crank active and cranking false. At least forty errors out of fifty samples are required, evaluated every one hundred milliseconds. A check made during cranking is outside this stated context.

Interpret an accompanying low-circuit code

The source notes that P06DB can also set in certain controllers. Their co-occurrence need not imply two independent failures. Use the exact output-driver architecture and circuit observations to resolve the signature.

Verification should show the off-state control-circuit test passes with the required voltage and engine state. Any independent oil-pressure warning needs its own vehicle-specific assessment; this electrical summary does not establish adequate lubrication. It also provides no universal pump replacement, connector pinout or safe method for forcing the control solenoid with external power.

Source and applicability

Documented monitors in gm-2025-03a, model year 2025. These are module/calibration examples; vehicle, engine and transmission applicability must be confirmed independently. GM 2025-03a, page 427.