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P1A3C on the 2022 Ford Mustang Mach-E

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.

Bulletins for this model year that name P1A3C
SSM 522802024-03-05. Service bulletin. Some 2021-2024 Mustang Mach-E, 2022-2024 E-Transit/F-150 Lightning vehicles may have diagnostic trouble code (DTC) P1A3C stored in the off-board charger controller module (OBCC). The P1A3C is commonly set due to an interruption of the direct current (DC) fast charging process and should be disregarded. All other DTCs stored in the OBCC are to be addressed using applicable publications and/or normal diagnostics found in Workshop Manual, Section 414-03B.
SSM 521302023-12-11. Service bulletin. Some 2021-2023 Mustang Mach-E, 2022-2023 E-Transit/F-150 Lightning vehicles may have diagnostic trouble code (DTC) P1A3C stored in the off-board charger controller module (OBCC). The P1A3C is commonly set due to an interruption of the direct current (DC) fast charging process and should be disregarded. All other DTCs stored in the OBCC are to be addressed using applicable publications and/or normal diagnostics found in Workshop Manual, Section 414-03B.
TSB 23-23262023-11-03. Service bulletin. This article supersedes TSB 22-2496 to update the Title and production clean date. Some 2021-2023 Mustang Mach-E built on or before 15-Sep-2023 and 2022-2023 E-Transit vehicles may experience an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTC) P1A3C, U3000:16, U3000:64, U3000:04 and/or U3000:45 in the off-board charging controller (OBCC) module and the high voltage (HV) battery will not charge using a level 3 direct current (DC) fast charging station/electrical vehicle supply equipment (EVSE). This may be due to OBCC software. To correct the condition, follow the Service Procedure to reprogram the OBCC.
TSB 22-24962023-01-05. Service bulletin. This article supersedes TSB 22-2402 to update the vehicle model years affected. Some 2021-2022 Mustang Mach-E base model (non-GT) built on or before 25-Jul-2022, 2022-2023 e-Transit vehicles built on or before 17-Sep-2022 may experience an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTC) P1A3C, U3000:16, U3000:64, U3000:04 and/or U3000:45 in the off-board charging controller (OBCC) module and the high voltage (HV) battery will not charge using a level 3 direct current (DC) fast charging station/electrical vehicle supply equipment (EVSE). This may be due to OBCC software. To correct the condition, follow the Service Procedure to reprogram the OBCC.

4 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.