Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2021EDGE SE, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 505 (ELECTRONIC POWER ASSIST STEERING (EPAS) GUIDED ROUTINE)DTC/SYMPTOM SELECTIONDTC INDEXPSCM - POWER STEERING CONTROL MODULEDTC U0121: LOST COMMUNICATION WITH THE ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULEDESCRIPTION
2021 Ford Edge SE, 4WD
DTC U0121: Lost Communication With The Anti-Lock Brake System (Abs) Control Module: Description
2021 Ford Edge SE, 4WDSECTION Description
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The PSCM monitors the HS-CAN messages when the ignition has been on for more than 5 seconds, the voltage to the PSCM is greater than 10 volts and there are no DTCs present inhibiting PSCM operation.
- DTC U0121:00 (Lost Communication with the Anti-lock Brake System (ABS) Control Module: No Sub Type Information) - This DTC sets when communication between the PSCM and the ABS module fails. The PSCM receives the vehicle speed signal over the HS-CAN from the ABS module. If the PSCM fails to communicate with the ABS module, the PSCM defaults to a predetermined vehicle speed value and steering assistance is reduced.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.