OBDII Code List
U0121 2012 FORD FUSION

U0121 2012 FORD FUSION - Lost Communication With The Anti-lock Brake System Control Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Damaged CAN communication bus circuit
  • Faulty Anti-lock Brake System (ABS)
  • Anti-lock Brake System (ABS) harness is open or shorted
  • Anti-lock Brake System (ABS) circuit poor electrical connection

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

U0121 2012 Ford Fusion Description

The Powertrain Control Module (PCM) continuously monitors the Controller Area Network (CAN) for messages from the ABS. The U0121 code sets when the PCM fails to receive the Anti-lock Brake System (ABS) message within the defined amount of time.
OBDII Code U0121 2012 Ford Fusion - Lost Communication With The Anti-lock Brake System Control Module -

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Related Information

U0121 2012 FORD FUSION Comments

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