U0121 - Lost Communication With The Anti-Lock Brake System (ABS) Control Module
DTC DESCRIPTION U0121 - LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM CONTROL MODULE
| Description: This DTC sets when the PCM does not 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 appropriate Module Communications Network article, Communication Network DTC Chart to continue diagnosis. | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST AE . | ||