U0146

Lost Communication With Serial Data Gateway Module A

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–222 (est.)

Symptoms

Check Engine light comes on
Incorrect operation of several vehicle systems
The car goes into emergency mode
Problems with diagnostics via OBD-II connector
Infotainment system malfunctions

Causes

Open or short circuit in the communication circuit
Data Gateway Module Failure
Module power problems
Corroded connectors or damaged wiring harness
Software error in the module

How to Fix

Check the integrity of the wiring harness and connectors
Check power and ground of the data gateway module
Scan all modules for additional error codes
Check or replace the data gateway module
Update module software if necessary

Related codes

U0140 U0141 U0155