Engine-Codes - Generic - U1291

U1291 - MICU Lost Communication With Relay Control Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

U1291 Possible Causes

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

How is the U1291 code repair?

Start by checking 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's pins.

What is the cost to diagnose the U1291 code

Labor: 1.0

The cost to diagnose the U1291 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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Possible Symptoms

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

U1291 Meaning

The Diagnostic Trouble Code (DTC) sets when a communication malfunction was detected between the Relay Control Module and the Rear Multiplex Integrated Control Unit (MICU).

More Information

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Information for specific makes

  • U1291 ACURA MICU Lost Communication With Relay Control Module
  • U1291 HONDA MICU Lost Communication With Relay Control Module

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