P287D
Electric/Auxiliary Transmission Fluid Pump Motor Torque Out Of Range
The motor torque required by the auxiliary transmission fluid pump is outside the calibrated window for the commanded duty. Pump load too high or too low for expected operation.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Common causes
Ordered by how often each turns out to be the cause.
- Pump internal wear changes torque demandCommon
- Fluid viscosity outside specPossible
Parts involved
- Aux Transmission Pump
- Transmission Fluid
P287D is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.