C0327
Encoder Motor
The transfer case control module has detected a fault in the encoder motor used to shift between 2WD and 4WD ranges. A fault prevents range changes and may leave the transfer case in an undefined position.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: hard
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Common causes
Ordered by how often each turns out to be the cause.
- Encoder motor failed (worn brushes or seized)Common
- Wiring or connector faultPossible
- Internal control module faultLess likely
Parts involved
- Encoder Motor
- Transfer Case Module
- Encoder Position Switch
C0327 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.