Network, generic

U0451 Invalid Data Received From Serial Data Gateway Module E

Check engine lightUsually off

EmissionsNot relevant

Drive cycleNot required

Limp modeNo

U0451 is the code for serial data gateway module E, the fifth gateway letter; lost communication with it is U0150. It is logged by a receiver that still hears E but finds its data implausible or its protection fields wrong. No manufacturer documents U0451 publicly, and five gateways in one vehicle are rare. Experience with gateway A helps in judging such entries: Volkswagen's bulletin 01-24-02 for the 2024 ID.4 lists U044700 among codes that various control units store statically or sporadically without a real fault, and GM's 2025 tables give camera and radar receivers a 0.625 s window and no MIL for gateway data. A stored U0451 without symptoms therefore deserves a software check before parts are replaced; an active one with warnings calls for checking bus and supply of module E.

Likely causes

Receiver software stores the code sporadically without a real fault

Software level of gateway E not matching after an update

Bus wiring, supply or ground fault at gateway E

Symptoms

Code stored without noticeable fault
Warnings from systems on the networks behind gateway E

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€0–900

Time0.3–2.5 h

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

Parts involved

gateway module ecan bus wiring

Related codes

U0150 U044A U0447

References: static.nhtsa.gov, gsi.ext.gm.com.