U0103
Lost Communication with Gear Shift Control Module
2016-2021 Mazda CX-3 2.0L I4
High SeverityNetworkGeneric (SAE)
Description
Cannot communicate with the gear shift module that manages electronic shifter input.
Symptoms
- Shifter inoperative
- Transmission stuck in park
- Shift indicator not matching
- Cannot select gears
Common Causes
- Shift module power failure
- CAN bus wiring issue
- Shift module failure
- Shifter cable disconnected
- Fuse blown
Diagnostic Steps
- Check shift module fuse
- Test module power and ground
- Inspect CAN wiring
- Check shifter mechanism
- Test shift position switches
Repair Notes
Check shift module power supply. Verify shifter mechanism is functional.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0005High Speed CAN Communication Bus (+) High
U0103 on Other Vehicles
Common Questions
What does code U0103 mean on a 2016-2021 Mazda CX-3?
U0103 stands for "Lost Communication with Gear Shift Control Module". Cannot communicate with the gear shift module that manages electronic shifter input.
What are the symptoms of U0103 on a Mazda CX-3?
Common symptoms of U0103 include: Shifter inoperative, Transmission stuck in park, Shift indicator not matching, Cannot select gears.
What causes U0103 on a 2016-2021 Mazda CX-3?
Common causes of U0103 include: Shift module power failure, CAN bus wiring issue, Shift module failure, Shifter cable disconnected, Fuse blown.