U0121 - Lost Communication With The Antilock Braking System (Abs) Control Module
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
U0121 - LOST COMMUNICATION WITH THE ANTILOCK BRAKING SYSTEM (ABS) CONTROL MODULE
| Description: | The powertrain control module (PCM) continuously monitors the controller area network (CAN) for messages from the ABS. This DTC sets when the PCM fails to receive the ABS message within the defined amount of time. | |||
| Possible Causes: |
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| Diagnostic Aids: | Network DTC concerns occur during module-to-module communication. Refer to the MODULE COMMUNICATIONS NETWORK -- E-SERIES , to diagnose the anti-lock brake system (ABS) module does not respond to the scan tool symptom. | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory | |
| All | - | |||