Network, generic

U0508 Invalid Data Received From Moveable Roof Control Module A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

The moveable roof control module drives an electric sunroof or panoramic glass panel, typically through a cable-driven motor with stored end positions and pinch protection. GM uses the same module name: its Saab 9-5 code list files the loss of contact with this module as U0207, the partner of this code. U0508 is stored when the roof module's position and status frames arrive but fail validation. BMW's SI B54 02 13 illustrates the kind of internal fault behind it: F30-series sunroofs stuck or moved in small steps, the FZD module logged checksum and calibration errors, and reprogramming fixed it. Separate generic codes exist for a sunroof control module (U046A); which name a car uses depends on the maker.

Likely causes

Roof module software or lost initialisation of end positions
Water damage from blocked roof drains
Damaged wiring or connector in the headliner

Symptoms

  • Sunroof stuck, moving jerkily or one-touch function lost
  • Roof not closing with the remote key

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–700
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

moveable roof module a

Related codes

U0207U050BU046A

References: saabwisonline.com, static.nhtsa.gov, en.wikipedia.org.