OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Powertrain generic / SAE

P27E7

Transmission Range Control B Circuit/Open

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

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number7 / E7

Possible causes

  • Open in actuator control wire high
  • Open coil in range control actuator medium
  • Pin pushed back out of connector body low

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

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 300–1800 €
  • Estimated time: 1.5–6 h
  • Component: transmission range control actuator b
  • Component: wiring harness
  • Component: tcm
  • MIL / check engine light
  • limp mode possible

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication