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B3894 Code – Stop Lamp Switch Circuit Plausibility Failure

What are the Possible Causes of the Code B3894?
  • Faulty Stop Lamp Switch Circuit
  • Stop Lamp Switch Circuit harness is open or shorted
  • Stop Lamp Switch Circuit 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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