U0420moderate severityNetwork
Invalid Data Received from Ride Level Control Module
on 2002 Mini Cooper 1.6L I4 · FWD
What this code means
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.
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Bluetooth code reader (~$25)
Veepeak OBDCheck BLE →
Pairs with your phone — reads and clears codes, live data.
Serious DIY (~$100)
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
Shop-grade tablet (~$300+)
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Other Network codes on this vehicle
CC-ID-181
System Check Failed
CC-ID-207
Central Electronics Failure, Stop 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