Pinpoint Test Applicability
WARNING: This page does not describe the selected car, but rather 27 other vehicles, including the 2022 Lincoln Navigator, 2022 Lincoln Nautilus, 2022 Lincoln Corsair, 2022 Lincoln Aviator, and 2022 Ford Transit-350 HD. However, it is still accessible from the selected car via links, so may be relevant.
This test applies to DTC U0420:xx Invalid Data Received from the Power Steering Control Module, and is set by other modules.
It DOES NOT apply to any other DTC.