U0169low severityNetwork
Lost Communication with Fuel Level Control Module
on 2017 Mazda Mazda3 2.0L I4 · FWD
What this code means
Cannot communicate with the fuel level sender or fuel gauge control module.
Symptoms
- Fuel gauge not reading
- Fuel level stuck at one position
- Low fuel warning inaccurate
- Range calculator not working
Common causes
- Fuel level module failure
- CAN bus wiring
- Module power loss
- Fuel sender failure
- Fuse blown
Diagnostic steps
- Check fuel gauge module fuse
- Test power and ground
- Check CAN wiring
- Test fuel level sender resistance
- Inspect fuel tank wiring connector
Repair notes
Check fuses and fuel sender. Fuel sender is most common failure point.
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