B0099low severityBody
Trunk/Liftgate Lock Circuit
on 2016 Mazda Mazda3 2.0L I4 · FWD
What this code means
Malfunction in the trunk or liftgate lock/latch actuator circuit.
Symptoms
- Trunk will not lock or unlock
- Liftgate latch not releasing
- Remote trunk release not working
- Trunk ajar warning stays on
Common causes
- Faulty trunk latch actuator
- Wiring damage in trunk lid
- Trunk release switch failure
- Latch mechanism jammed
- BCM output issue
Diagnostic steps
- Test trunk release switch
- Apply direct power to latch actuator
- Inspect wiring in trunk lid hinge area
- Check for mechanical latch jam
- Test BCM trunk output
Repair notes
Replace trunk latch actuator or repair wiring. Check hinge area wiring for fatigue damage.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0006
Passenger Knee Airbag Deployment Circuit
B0007
Rear Left Side Airbag Deployment Circuit
B0008
Rear Right Side Airbag Deployment Circuit
B0009
Rear Center Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment