U0191Lost Communication With Television
- Generic OBD-II code · Network
- How the car detects it
- U0191 means the television tuner has dropped off the vehicle network. J2012 simply calls it Television: a receiver for mostly digital terrestrial TV that hands the picture to the central display or to rear screens. GM fills the slot under that name in the Saab U-code lists of the 9-5 from 2010-2011 and the 9-4X from 2011; the NHTSA bulletin index has no matching entry. A listening unit, usually the radio or the display, records the code once the tuner's cyclic frames stay away while supply voltage is normal (GM: 9-16 V). The TV source then disappears or stays black, while radio and navigation carry on. U0492 reports invalid data from the same tuner, U0184 concerns the radio. No MIL.
- What you may notice
- TV source missing from the media menu
- Black screen or no-signal message when TV is selected
- Code stored in radio or display unit
- Likely causes
- LikelyTV tuner without power or ground (fuse, connector)
- PossibleHistory entry after flat battery or tuner unplugged with bus awake
- PossibleBus line or connector to the tuner damaged
- RareTV tuner module faulty
- Repair
- Medium · Often possible to do yourself.Typical cost: €0 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.