Engine-Codes - Honda - B1056 Honda

B1056 Honda Code - Relay Control Module Lost Communication With MICU

- Code Popularity: 6,970 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC B1056 Honda?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Multiplex Control Unit Module (MICU)
  • Multiplex Control Unit Module (MICU) harness is open or shorted
  • Multiplex Control Unit Module (MICU) circuit poor electrical connection
  • Faulty Relay Control Module
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How to Fix the DTC B1056 Honda?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the B1056 Honda code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the B1056 Honda Code Mean?

The Relay Control Module monitors the Multiplex Control Unit Module (MICU). The Relay Control Module sets the OBDII code when the Multiplex Control Unit Module (MICU) is not to factory specifications.

B1056 Honda Code - Relay Control Module Lost Communication With MICU

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