U0037
LIN Bus A Communication Performance
2014-2021 Mazda Mazda6 2.5L I4
Low SeverityNetworkGeneric (SAE)
Description
Communication on LIN bus A is degraded. LIN buses connect lower-priority subsystems like seat modules, rain sensors, and mirror controls.
Symptoms
- Seat adjustment issues
- Rain sensor not responding
- Auto-dimming mirror malfunction
- Intermittent accessory faults
Common Causes
- LIN bus wiring issue
- LIN master module fault
- LIN slave device failure
- Wiring resistance too high
Diagnostic Steps
- Check LIN bus voltage (typically 0-12V)
- Test LIN master module
- Inspect LIN wiring for high resistance
- Check LIN slave device responses
Repair Notes
LIN bus operates at lower speeds. Check wiring resistance and master module.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
- U0009High Speed CAN Communication Bus Shorted Together
- U0010Medium Speed CAN Communication Bus
U0037 on Other Vehicles
Common Questions
What does code U0037 mean on a 2014-2021 Mazda Mazda6?
U0037 stands for "LIN Bus A Communication Performance". Communication on LIN bus A is degraded. LIN buses connect lower-priority subsystems like seat modules, rain sensors, and mirror controls.
What are the symptoms of U0037 on a Mazda Mazda6?
Common symptoms of U0037 include: Seat adjustment issues, Rain sensor not responding, Auto-dimming mirror malfunction, Intermittent accessory faults.
What causes U0037 on a 2014-2021 Mazda Mazda6?
Common causes of U0037 include: LIN bus wiring issue, LIN master module fault, LIN slave device failure, Wiring resistance too high.