U048BInvalid Data Received From Headlamp Leveling Control Module B
- Generic OBD-II code · Network
- How the car detects it
- U048B concerns the second headlamp leveling control module, B, whose messages reach the receiver but are discarded as corrupt or implausible; if B fell silent, U018A would be logged, while module A has U0482 and U0181. A second address is needed where each headlamp carries its own electronics or a central unit works with lamp-side controllers. No maker assigns the letter publicly or documents U048B. Comparable lamp-side faults appear under brand codes: Mazda's AFS control module on the 2024 CX-90 falsely flagged B10A3:86, an error signal from the left swivel actuator, until new software arrived (09-039-24), and GM had the headlamp control module of the 2016 Buick Cascada set up again to clear B101E and a leveling warning (16-NA-044). Expect a lighting warning; no MIL.
- What you may notice
- Headlamp leveling or adaptive lighting warning
- Beam height on one side no longer adjusted
- Likely causes
- PossibleSoftware of the lamp-side or leveling module misjudging actuator feedback
- PossibleSetup or configuration of the headlamp module not completed after assembly or replacement
- RareMoisture or poor contact at the connector of the second headlamp
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.