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

C0387

Transfer Case Position Sensor

The transfer case control module has detected an implausible signal from the position sensor that reports the current shift position (2HI, 4HI, 4LO, neutral). Without a valid position the system cannot complete a range change.

SystemChassis
Typegeneric / SAE
GroupC0
Range / number3 / 87

Possible causes

  • Transfer case position sensor failed high
  • Wiring or connector fault medium
  • Encoder motor stuck between positions low

Symptoms

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

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 200–1200 €
  • Estimated time: 0.8–4 h
  • Component: transfer case position sensor
  • Component: transfer case module
  • Component: encoder motor

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