U0149low severityNetwork
Lost Communication with Seat Control Module C
on 2024 Mazda MX-5 Miata 2.0L I4 · RWD
What this code means
Cannot communicate with the rear seat control module on vehicles with powered rear seats.
Symptoms
- Rear power seat not adjustable
- Rear seat recline not working
- Rear heated seats from module offline
Common causes
- Rear seat module failure
- Wiring issue
- Power loss
- Fuse blown
Diagnostic steps
- Check rear seat module fuse
- Test power and ground
- Inspect wiring to rear seats
- Check module connector
Repair notes
Check rear seat module fuse and connector access behind rear seat.
Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus