Engine-Codes - Ford - U0121 2009 Ford Fusion

U0121 2009 Ford Fusion Code - Lost Communication With The Anti-lock Brake System Control Module

- Code Popularity: 3,074 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC U0121 2009 Ford Fusion?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Damaged CAN communication bus circuit
  • Faulty Anti-lock Brake System (ABS) Control Module
  • Anti-lock Brake System Control Module harness is open or shorted
  • Anti-lock Brake System Control Module circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)
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How to Fix the DTC U0121 2009 Ford Fusion?

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 U0121 2009 Ford Fusion 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 U0121 2009 Ford Fusion Code Mean?

The Powertrain Control Module (PCM) continuously monitors the Controller Area Network (CAN) for messages from the ABS. The Diagnostic Trouble Code (DTC) U0121 sets when the PCM fails to receive the Anti-lock Brake System (ABS) message within the defined amount of time.

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U0121 2009 Ford Fusion Code - Lost Communication With The Anti-lock Brake System Control Module

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