This article supersedes TSB 21-2205 to update the vehicles and vehicle model years affected. 2021-2022 F-150 vehicles with 2.7L, 3.5L EcoBoost or 5.0L engines, 2020-2022 Transit vehicles with 3.5L EcoBoost engine having charging system diagnostics performed in the Workshop Manual (WSM) may experience the generator voltage desired (GENVDSD) parameter identification (PID) missing from the powertrain control module (PCM) PID list in the FDRS. This may be due to a software parameter in the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM.
