U044AInvalid Data Received From Serial Data Gateway Module D
- Generic OBD-II code · Network
- How the car detects it
- U044A covers serial data gateway module D. A receiver records it when D's frames carry implausible values or violate their counter or checksum; if they stop, U0149 is the matching code. No manufacturer explains U044A publicly, but Stellantis shows which unit can hold the letter D: for the 2021 Jeep Grand Cherokee, case S2108000139 describes the driver assistance module logging U0149-00, which Stellantis words as lost contact to the security gateway, together with a brief Traffic Sign Assist message at start-up; no repair is needed and a camera module software update was announced. On such vehicles invalid data from the security gateway would therefore mainly affect assistance and display functions. As with the other gateway codes, software levels and supply are checked before hardware is replaced.
- What you may notice
- Brief assistance unavailable message at start-up
- Driver assistance or display functions limited
- Likely causes
- PossibleReceiver software (e.g. camera or assistance module) misjudges gateway data at start-up
- PossibleSoftware or configuration of gateway D not matching the vehicle
- RareSupply, ground or bus wiring fault at gateway D
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €0 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.