OBD-II code · Powertrain (generic)

P0B0C Electric/Auxiliary Transmission Fluid Pump A Hydraulic Leakage

The TCM detects hydraulic leakage from auxiliary transmission fluid pump A. Pump output cannot maintain pressure due to internal or external leak.

Is it safe to drive with P0B0C?

The car may go into limp mode (reduced power). Get it diagnosed before a long trip.

Common causes

  • Most likelyPump seal aged
  • PossibleInternal pump wear

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
Hard
DIY friendly
Best left to a mechanic
Typical labour
2–8 h
Emissions test
Usually unaffected
Parts involved
Aux Trans Pump A, Transmission Fluid

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.