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Home >> Ford >> 2014 >> Fiesta ST >> Repair and Diagnosis >> External Pages >> Different car >> Section 332 (Electronic Power Assist Steering Component Testing) >> DTC Symptom Index >> DTC Index >> PSCM - Power Steering Control Module >> DTC U0401: Invalid Data Received from ECM/PCM A >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2015 Ford Fiesta. However, it is still accessible from the selected car via links, so may be relevant.

If the vehicle speed signal is the cause of the concern, the PSCM uses a default vehicle speed value and the level of steering assistance does not change as vehicle speed increases or decreases.

DTC U0401:00 indicates an engine speed or vehicle speed message concern. The module reporting this DTC is not the problem module. Do not install a new PSCM as part of the repair for PSCM DTC U0401:00. The PSCM sends a message to the IPC to display SERVICE POWER STEERING NOW in the message center.

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