C0500high severityChassis
Transfer Case Control Module Malfunction
on 2014 Ram 2500 6.7L I6 Cummins Diesel · 4WD
What this code means
Internal fault in the transfer case control module that manages 4WD/AWD operation.
Symptoms
- 4WD warning light
- Service 4WD message
- Cannot shift between 2WD and 4WD
- Transfer case stuck in current mode
Common causes
- Module internal failure
- Module power supply fault
- Software error
- CAN communication loss
- Overheated module
Diagnostic steps
- Check module power supply and ground
- Scan for CAN communication codes
- Check module connector for corrosion
- Attempt module reset
- Check for software updates
Repair notes
Replace transfer case control module. Reprogram and calibrate after installation.
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C0021
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C0023
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C0025
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C0026
RF Wheel Speed Sensor Circuit Intermittent
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C0028
RR Wheel Speed Sensor Circuit Intermittent
C0035
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C0036
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