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

P27F5

Gear Shift Lock Solenoid/Actuator A Stuck Off

The shift lock solenoid for selector lever A does not engage when commanded. The selector can be moved without the safety interlock active.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number7 / F5

Possible causes

  • Lock actuator failed mechanically high
  • Open in solenoid control wire medium
  • Carbon or debris buildup preventing free movement 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: medium
  • DIY: shop recommended
  • Estimated cost: 150–700 €
  • Estimated time: 0.5–3 h
  • Component: shift lock solenoid a
  • Component: shift lock actuator a
  • Component: tcm
  • MIL / check engine light

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