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Service bulletins for the 2021 Ford Mustang Mach-E

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

329 on file from NHTSA, as of 2026-10-19.

About P1A3C on the 2021 Ford Mustang Mach-E: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: P1A3C are shown. Show all

Bulletins, newest first
SSM 522802024-03-05. Service bulletin. EQUIPMENT. 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. ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:MODULE:ONBOARD (OBCM). 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. ELECTRICAL SYSTEM. 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. UNKNOWN OR OTHER; ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION MOTOR:CONTROLLER:SOFTWARE. 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.
TSB 22-24022022-11-01. Service bulletin. ELECTRICAL SYSTEM. Some 2021-2022 Mustang Mach-E base model (non-GT) built on or before 25-Jul-2022, 2022 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.
TSB 22-20572022-03-01. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Some 2021 Mustang Mach-E 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 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.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.