U0420
Invalid Data Received from Ride Level Control Module
2002-2007 Buick Rendezvous 3.5L V6
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
- 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
U0420 on Other Vehicles
Common Questions
What does code U0420 mean on a 2002-2007 Buick Rendezvous?
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 Buick Rendezvous?
Common symptoms of U0420 include: Suspension warning light, Incorrect ride height, Vehicle listing to one side, Compressor cycling abnormally.
What causes U0420 on a 2002-2007 Buick Rendezvous?
Common causes of U0420 include: Height sensor calibration lost, CAN bus noise, Module sending incorrect data, Sensor wiring issue.