Error code
OBD2 U0421
OBD2U0421
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Invalid Data Received From Ride Level Control Module.
Severity
moderateCan be driven, but may experience issues with suspension adjustments.
Summary
U0421 indicates invalid data received from the suspension ride height control module, which is part of the vehicle's electronic system responsible for managing ride height adjustments.
Common Causes
- Faulty or damaged wiring between the ride height control module and other components
- Malfunctioning ride height control module itself
Fixes
- Inspect and repair any damaged wiring or connectors related to the ride height control module.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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