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B3978 Code – Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module

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What are the Possible Causes of the Code B3978?
  • Faulty Inflatable Restraint Sensing and Diagnostic Module
    • Inflatable Restraint Sensing and Diagnostic Module harness is open or shorted
  • Inflatable Restraint Sensing and Diagnostic Module circuit poor electrical connection
  • Faulty Body Control Module (BCM)

    • Need help with this OBD II code? Our mechanics are available within west Michigan to help. Outside of our service area? Visit our Car Help Section where you can ask questions and get answers.

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