OBD-II code · Powertrain (generic, extended)
P277C Electric/Auxiliary Transmission Fluid Pump B Motor Stalled
The second auxiliary transmission fluid pump motor is commanded on but the rotor does not turn.
Is it safe to drive with P277C?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyImpeller jammed by sediment or debris
- PossibleMotor seized by bearing failure
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
- 1–3.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Aux Trans Pump B, Pump Motor
Related codes
- P0C2AElectric/Auxiliary Transmission Fluid Pump A Motor Stalled
- P2779Downshift Switch Circuit Range/Performance
- P277AElectric/Auxiliary Transmission Fluid Pump B Hydraulic Leakage
- P277BElectric/Auxiliary Transmission Fluid Pump B Driver Circuit Performance
- P277DElectric/Auxiliary Transmission Fluid Pump B Motor Over Temperature
- P277EClutch A Unexpected Mechanical Gear Disengagement
- P277FClutch B Unexpected Mechanical Gear Disengagement
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.