P276A
Electric/Auxiliary Transmission Fluid Pump B Motor Supply Voltage Circuit / Open
The motor supply line of the second electric or auxiliary transmission fluid pump is open. Pump cannot run, hydraulic pressure is lost during stop-start engine-off events.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
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.
- Blown fuse on supply lineCommon
- Broken supply wirePossible
Parts involved
- Aux Trans Pump B
- Supply Circuit
- Wiring Harness
P276A 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.