Engine-Codes - Generic - B2122

B2122 Code - Ignition Run Control Circuit Low

- Code Popularity: 8,457 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 B2122?

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 Run Relay
  • Run Relay harness is open or shorted
  • Run Relay circuit poor electrical connection
  • Faulty Front Control Module (FCM)
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How to Fix the DTC B2122?

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 B2122 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 B2122 Code Mean?

The Front Control Module monitors the Ignition Run Control Circuit. The Front Control Module will set this Diagnostic Trouble Code (DTC) within 500ms if the Run Relay Control Circuit voltage is open or shorted to ground.

B2122 Code - Ignition Run Control Circuit Low

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Code B2122 Information for Specific Makes

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