U0168critical severityNetwork
Lost Communication with Passive Restraint Module
on 2019 Mazda Mazda3 2.5L I4 · FWD
What this code means
Cannot communicate with the passive restraint or supplemental restraint (SRS) module.
Symptoms
- Airbag warning light on
- SRS system disabled
- Seatbelt pretensioners disabled
- Passenger airbag status unknown
Common causes
- SRS module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Clockspring failure
Diagnostic steps
- Check SRS module fuse
- Test power and ground
- Check CAN wiring
- Check clockspring
- Inspect SRS connectors under seats
Repair notes
Safety critical system. Check fuses. Do not attempt to service SRS without proper training.
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