C0327Encoder Motor
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C0327 has no entry in the published J2012 tables, but GM documents it: the transfer case control module (TCCM) of 4WD trucks and SUVs uses it for the encoder that tells the module where the motor has turned the shift shaft. Dorman's instruction sheets for GM pickups and SUVs from 1998 to 2009, the Saab 9-7X included, describe it as a voltage outside the expected window on the encoder circuit; play in a worn shift shaft can also make the encoder report a false position. GM bulletin PIP5098 for the 2004–12 Colorado and Canyon links it to a Service 4WD message after cold or damp standing and points to ground circuit 550 of the encoder motor channels, terminal F7 of connector 2 in the underhood fuse block. PIP5094 lists the number among GM chassis codes.
- What you may notice
- Service 4WD message or flashing 4WD switch lamps
- Transfer case does not shift or shifts only intermittently
- Fault appears mainly on the first drive after cold or damp standing
- Likely causes
- LikelyLoose or corroded ground terminal for the encoder channels (GM circuit 550)
- PossibleDamaged encoder harness or water in the motor connector
- PossibleEncoder in the shift motor assembly defective
- RareWorn shift shaft lets the encoder read a false position
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.