Chassis, generic

C0600 4WD/AWD Range Actuator Position Control Error

Check engine lightUsually off

EmissionsNot relevant

Drive cycleRequired

Limp modePossible

The position loop that drives the range actuator to a target does not reach or hold it: commanded and measured position stay apart for too long, although sensor and drive circuit pass their own checks. Magna describes such a loop for a transfer case range shift, with speed profiles per shift phase and PID control over the last tenth of travel down to a stop at the target. Lear's actuator patent notes that the feedback should stop the worm gear at about 270 degrees but can overrun towards the 330 degree stop. Typical causes are binding, a weak motor, low voltage or poor learned limits. GM used C0600 earlier for a suspension accelerometer (PI0954, 2010 LaCrosse); that is a different, older assignment. No maker documents C0600 in this meaning.

Likely causes

Stiff range fork, cam or shift rail slows the actuator

Weak shift motor or low supply voltage

Learned end positions no longer match the hardware

Play between sensor target and shift mechanism

Symptoms

Range shift incomplete, indicator flashes
4WD service message and range shifts blocked
Noise from the transfer case while the motor hunts for position

Repair estimate

DifficultyHardWorkshop job

Parts and labour€100–1,500

Time0.5–6 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

range actuatorrange pos sensortransfer case control module

Related codes

C05FA C05FC C05FF C05E6 C05EF

References: patents.google.com, patents.google.com, static.nhtsa.gov, static.nhtsa.gov.