U0420
Invalid Data Received from Ride Level Control Module
2016-2021 Mazda CX-3 2.0L I4
Moderate SeverityNetworkGeneric (SAE)
Description
Data from the air suspension or ride height control module is corrupted.
Symptoms
- Suspension warning light
- Incorrect ride height
- Vehicle listing to one side
- Compressor cycling abnormally
Common Causes
- Height sensor calibration lost
- CAN bus noise
- Module sending incorrect data
- Sensor wiring issue
Diagnostic Steps
- Check ride height sensor readings
- Recalibrate suspension module
- Test CAN bus quality
- Inspect height sensor wiring
- Compare actual vs reported ride height
Repair Notes
Recalibrate ride height sensors. Check sensor wiring at each corner.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0005High Speed CAN Communication Bus (+) High
U0420 on Other Vehicles
Common Questions
What does code U0420 mean on a 2016-2021 Mazda CX-3?
U0420 stands for "Invalid Data Received from Ride Level Control Module". Data from the air suspension or ride height control module is corrupted.
What are the symptoms of U0420 on a Mazda CX-3?
Common symptoms of U0420 include: Suspension warning light, Incorrect ride height, Vehicle listing to one side, Compressor cycling abnormally.
What causes U0420 on a 2016-2021 Mazda CX-3?
Common causes of U0420 include: Height sensor calibration lost, CAN bus noise, Module sending incorrect data, Sensor wiring issue.