OBD-II code · Powertrain (generic, extended)
P276B Electric/Auxiliary Transmission Fluid Pump B Motor Supply Voltage Circuit Low
The motor supply voltage of the second auxiliary transmission fluid pump is below the operating range.
Is it safe to drive with P276B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyHigh-resistance battery feed
- PossibleWeak battery sags under pump current
- Less likelyConnector pins corroded - high contact resistance
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
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.8–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Aux Trans Pump B, Supply Circuit, Battery
Related codes
- P0B0AElectric/Auxiliary Transmission Fluid Pump A Motor Supply Voltage Circuit Low
- P2768Input/Turbine Shaft Speed Sensor B Circuit Intermittent
- P2769Torque Converter Clutch Solenoid Circuit Low
- P276AElectric/Auxiliary Transmission Fluid Pump B Motor Supply Voltage Circuit / Open
- P276CElectric/Auxiliary Transmission Fluid Pump B Motor Supply Voltage Circuit High
- P276DElectric/Auxiliary Transmission Fluid Pump B Motor Current
- P276EElectric/Auxiliary Transmission Fluid Pump B Motor Current Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.