B1009 HONDA - MICU Lost Communication With The Combination Switch Control Unit

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

Possible causes

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

Possible symptoms

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

B1009 Honda Description

The Multiplex Control Unit Module (MICU) monitors the Combination Switch Control Unit. The MICU sets the OBDII code when the Combination Switch Control Unit is not to factory specifications.
OBDII Code B1009 Honda - MICU Lost Communication With The Combination Switch Control Unit - Engine-Codes.com

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