U0552Invalid Data Received From Running Board Control Module B
- Generic OBD-II code · Network
- How the car detects it
- A second running board controller only makes sense where each side of the vehicle has its own electronics. A 2004 Ford patent for powered boards has one central module drive the left and right boards separately, so a design with one node per side is plausible, but no manufacturer publishes which side B would be. Ford, the best documented user of power running boards, fits a single RBM in the F-150, Super Duty and Expedition/Navigator; it drops from Auto to Off after a battery undervoltage event with U3003:16 (SSM 50154). U0552 means messages from module B arrive but fail plausibility; U0251 would mean they are missing. No manufacturer documents U0552 publicly. Typically one board stops deploying or the feature switches itself off.
- What you may notice
- Running board on one side no longer deploys or retracts
- Running board setting changes from Auto to Off without driver input
- Likely causes
- PossibleBattery undervoltage or discharged battery disturbing the running board electronics
- PossibleRunning board module software fault (Ford fixes comparable faults by reprogramming)
- PossibleCorroded connector or chafed wiring at the board motor under the body
- RareRunning board control module B internally faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.