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Home >> Lincoln >> 2019 >> MKZ Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 2242 (EPAS Guided Routine) >> Pinpoint Tests >> Pinpoint Tests B: DTC U0420:XX Invalid Data Received From The PSCM >> DTC Trigger

DTC Trigger

WARNING: This page is about a different car, the 2019 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

This DTC occurs when other modules do not receive the PSCM messages within a certain time frame. This can occur if the PSCM wiring harness or electrical connectors are loose or damaged, or if the vehicle battery state of charge levels are too low for the PSCM to initialize and power up in time to communicate with the other modules. Consult the DTC Index for additional information if needed.

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