C0501moderate severityChassis
Transfer Case Control Module Communication
on 2010 Tesla Roadster Single Motor RWD · RWD
What this code means
Loss of communication between the transfer case module and other vehicle systems.
Symptoms
- 4WD light flashing
- Service 4WD warning
- Cannot select drive modes
- Transmission may default to limp mode
Common causes
- CAN bus wiring fault to module
- Module connector disconnected
- Module power loss
- CAN bus termination issue
Diagnostic steps
- Check CAN wiring to transfer case module
- Inspect module connector
- Verify power and ground at module
- Look for U-codes related to transfer case
- Check CAN bus resistance
Repair notes
Repair CAN wiring or connector. Replace module if communication chip failed.
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Other Chassis codes on this vehicle
C0021
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C0022
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C0023
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C0024
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C0025
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C0026
RF Wheel Speed Sensor Circuit Intermittent
C0027
LR Wheel Speed Sensor Circuit Intermittent
C0028
RR Wheel Speed Sensor Circuit Intermittent
C0035
Left Front Wheel Speed Sensor Circuit
C0036
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