Network, generic

U0492 Invalid Data Received From Television

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0492 is set when a television tuner keeps transmitting but the module listening to it, usually the head unit or a display controller, cannot use what arrives, for instance because values lie outside their defined range, a message counter stalls or a checksum is wrong. GM's 2011 code lists for the Saab 9-5 and 9-4X simply call the matching lost-contact code U0191 Television, meaning a separate TV receiver on the bus. Elsewhere the tuner lives inside the radio: for Japanese-market Jeep Grand Cherokee and Cherokee of 2014, bulletin 08-067-15 updated the radio software, which among other things cured a blurry digital TV picture. No manufacturer documents U0492 itself. Expect a missing or frozen TV image while radio and other sources carry on; driving is unaffected, no MIL.

Likely causes

Tuner or head-unit software with faulty TV data, cured by an update
Internal fault of the TV tuner
Supply, ground or bus connection fault at the tuner

Symptoms

  • No TV picture or a frozen, blurred image
  • Radio and other media sources keep working

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–800
Time0.5–2 h

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

Parts involved

tv tuner module

Related codes

U0191U0485U0497

References: saabwisonline.com, saabwisonline.com, static.nhtsa.gov.