OBD-II code · Powertrain (generic, extended)

P2797 Electric/Auxiliary Transmission Fluid Pump A Performance/Stuck Off

The first auxiliary transmission fluid pump is commanded on but does not run.

Is it safe to drive with P2797?

Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.

Common causes

  • Most likelyPump motor seized by sediment
  • PossibleCracked rotor magnet decouples drive
  • Less likelyCarbon or debris buildup preventing free movement

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
1–4 h
Emissions test
Usually unaffected
Parts involved
Aux Trans Pump A, Pump Motor

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