B1005 HONDA - MICU Lost Communication With Relay Control Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

Possible causes

  • Faulty Relay Control Module
  • Relay Control Module harness is open or shorted
  • Relay Control Module circuit poor electrical connection
  • Faulty Multiplex Control Unit Module (MICU)

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B1005 Honda Description

The Multiplex Control Unit Module (MICU) monitors the Relay Control Module. The MICU sets the OBDII code when the Relay Control Module is not to factory specifications.
OBDII Code B1005 Honda - MICU Lost Communication With Relay Control Module - Engine-Codes.com

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