C0600 code meaning
4WD/AWD Range Actuator Position Control Error
What C0600 means
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.
C0600 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 6 hours
- Clears after repairAfter a drive cycle
Symptoms of C0600
- Range shift incomplete, indicator flashes
- 4WD service message and range shifts blocked
- Noise from the transfer case while the motor hunts for position
Common causes of C0600
- Most likelyStiff range fork, cam or shift rail slows the actuator
- PossibleWeak shift motor or low supply voltage
- PossibleLearned end positions no longer match the hardware
- Less likelyPlay between sensor target and shift mechanism
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Range actuatorRange pos sensorTransfer case control module
What each part of C0600 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 00 | The exact fault in that area. |
What to do next
- Note C0600 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about C0600
What does C0600 mean?
C0600 means "4WD/AWD Range Actuator Position Control Error". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with C0600?
Drive gently and only to a workshop. With C0600 the car can go into limp mode (reduced power) to protect itself.
Will C0600 fail an emissions test?
C0600 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is C0600 to fix?
Difficulty: hard. A typical repair takes 0.5 to 6 hours of work. This is a job for a workshop.
Will C0600 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.