OBD-II code · Powertrain (generic, extended)

P27E9 Transmission Range Control B Circuit Low

The B-channel actuator of the transmission range control reports a circuit low condition. Gear-selector mechanical engagement cannot be requested as expected.

Is it safe to drive with P27E9?

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

Common causes

  • Most likelyControl wire shorted to ground
  • PossibleInternal short in actuator coil
  • 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
Hard
DIY friendly
Best left to a mechanic
Typical labour
1.5–6 h
Emissions test
Usually unaffected
Parts involved
Transmission Range Control Actuator B, Wiring Harness, Tcm

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