C0501
Transfer Case Control Module Communication
1992-1998 BMW 325i E36 2.5L I6 M50 🇨🇦
Moderate SeverityChassis
Description
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.
Related Codes
Other Chassis Codes
- C0021LF Wheel Speed Sensor Range/Performance
- C0022RF Wheel Speed Sensor Range/Performance
- C0023LR Wheel Speed Sensor Range/Performance
- C0024RR Wheel Speed Sensor Range/Performance
- C0025LF Wheel Speed Sensor Circuit Intermittent
- C0026RF Wheel Speed Sensor Circuit Intermittent
- C0027LR Wheel Speed Sensor Circuit Intermittent
- C0028RR Wheel Speed Sensor Circuit Intermittent
- C0035Left Front Wheel Speed Sensor Circuit
- C0036Left Front Wheel Speed Signal Erratic
C0501 on Other Vehicles
Common Questions
What does code C0501 mean on a 1992-1998 BMW 325i E36?
C0501 stands for "Transfer Case Control Module Communication". Loss of communication between the transfer case module and other vehicle systems.
What are the symptoms of C0501 on a BMW 325i E36?
Common symptoms of C0501 include: 4WD light flashing, Service 4WD warning, Cannot select drive modes, Transmission may default to limp mode.
What causes C0501 on a 1992-1998 BMW 325i E36?
Common causes of C0501 include: CAN bus wiring fault to module, Module connector disconnected, Module power loss, CAN bus termination issue.