Skip to content

B2122 Code – Ignition Run Control Circuit Low

What are the Possible Causes of the Code B2122?
  • Faulty Run Relay
  • Run Relay harness is open or shorted
  • Run Relay circuit poor electrical connection
  • Faulty Front Control Module (FCM)
  • Faulty Low Voltage Differential Signaling (LVDS) Cable
  • 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.

Leave a Reply