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!

Chassis generic / SAE

C0388

Transfer Case High Range Switch Circuit Malfunction

The transfer case control module has detected an implausible state from the high range (4H) position switch. Range selection in 4WD mode may be limited.

SystemChassis
Typegeneric / SAE
GroupC0
Range / number3 / 88

Possible causes

  • High range position switch failed high
  • Shift actuator out of position medium

Symptoms

  • ABS warning light on
  • ESC/stability control deactivated
  • Possible reduced brake assist
  • Speedometer may behave erratically

Inspection / repair

  • Difficulty: medium
  • DIY: shop recommended
  • Estimated cost: 150–800 €
  • Estimated time: 1–3 h
  • Component: transfer case switch
  • Component: transfer case module
  • Component: shift actuator

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