What causes B1058 on a Honda?

Faulty door multiplex control unit Open or short in the door multiplex control unit harness Poor electrical connection in the door multiplex control unit circuit Faulty relay control module Corroded or loose pins on the data link

How do I fix B1058 on a Honda?

Confirm the code and check every module for related faults Inspect the data link connectors at both ends for corrosion and loose pins Test the data link wiring for opens and shorts Repair damaged wiring or connectors before replacing a module Replace the relay control module that fails testing Clear the code and retest

B1058 The relay control module lost communication with the door multiplex control unit

Q: What does B1058 mean on a Honda?

B1058. The relay control module lost communication with the door multiplex control unit. Door lock and window features may stop working. Applies to Honda and Acura models that use this code.

Category: Network Communications
Severity: Check Engine Light
Applies to: Honda and Acura models that use this code

What does B1058 mean on a Honda?

B1058. The relay control module lost communication with the door multiplex control unit. Door lock and window features may stop working. This Honda-enhanced code applies to Honda and Acura models that use this code.

Common causes of B1058

Faulty door multiplex control unit
Open or short in the door multiplex control unit harness
Poor electrical connection in the door multiplex control unit circuit
Faulty relay control module
Corroded or loose pins on the data link

How to fix B1058

Confirm the code and check every module for related faults
Inspect the data link connectors at both ends for corrosion and loose pins
Test the data link wiring for opens and shorts
Repair damaged wiring or connectors before replacing a module
Replace the relay control module that fails testing
Clear the code and retest

Sources and review

Last updated 2026-10-10.