Network, generic

U0499 Invalid Data Received From Telematic Control Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0499 means the telematic control module, which carries the cellular modem for remote services and, in the EU, the 112 eCall required by Regulation 2015/758, sends data a receiver rejects. GM's 2025 tables (25OBDG04B) let the object calculation module EOCM3 check ARC, checksum or MAC on the telematics unit's precise positioning frames (heading, latitude, longitude): 6 of 10 faulty, judged over 8 s of a 10 s window, 9-16 V, partial network on, over 5 s after reset; Type D, no MIL, Super Cruise and adaptive cruise switch off. Stellantis (08-216-26, 2026 Charger; S268A000004, 2026 Cherokee) finds U0499-00 in the BCM, to be solved by TBM software, not by new parts. U0198 is lost contact.

Likely causes

Telematics module software sending faulty or unprotected frames, fixed by an update
Corrupted positioning data from the telematics unit (GPS antenna or receiver issues)
Internal fault of the telematics module

Symptoms

  • Super Cruise or adaptive cruise unavailable on GM vehicles
  • Connected services or an infotainment service message
  • Often no noticeable effect, code cannot be cleared

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

telematic module

Related codes

U0198U0498U0493

References: gsi.ext.gm.com, static.nhtsa.gov, static.nhtsa.gov, eur-lex.europa.eu.