Transfer Case Encoder Ring Circuit

What this code means

Malfunction in the transfer case encoder motor position feedback sensor.

Symptoms

• 4WD indicator incorrect
• Cannot verify shift completion
• Service 4WD message
• Shift hunts back and forth

Common causes

• Encoder ring sensor failure
• Encoder contaminated with metal particles
• Wiring damage
• Shift motor assembly failure

Diagnostic steps

1. Read encoder position with scan tool
2. Command shift and watch encoder response
3. Inspect encoder wiring
4. Check transfer case fluid for metal contamination
5. Test encoder sensor output

Repair notes

Replace encoder motor assembly. Flush transfer case if fluid is contaminated.

Other Chassis codes on this vehicle