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Service bulletins for the 2016 Fiat 500

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.

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

About C2020 on the 2016 Fiat 500: what the code means, and the bulletins and recalls about the same components.

By type

By component

By trouble code

Only bulletins with trouble code: C2020 are shown. Show all

Bulletins, newest first
21-038-15 REV. B2022-08-08. Service bulletin. WHEELS; AIR BAGS; ELECTRICAL SYSTEM. Flash: Drivetrain Control Module (DTCM) C2020-01 ECU Internal Fault setting in the DTCM This bulletin involves reprogramming the Drivetrain Control Module (DTCM) with the latest available software. Some vehicles may experience the All Wheel Drive Light (AWD) illuminating due to DTC C2020-01 ECU Internal Fault setting erroneously in the DTCM.
21-038-15 REV. A2022-08-08. Service bulletin. ELECTRICAL SYSTEM; AIR BAGS; WHEELS. Flash: Drivetrain Control Module (DTCM) C2020-01 ECU Internal Fault setting in the DTCM This bulletin involves reprogramming the Drivetrain Control Module (DTCM) with the latest available software. Some vehicles may experience the All Wheel Drive Light (AWD) illuminating due to DTC C2020-01 ECU Internal Fault setting erroneously in the DTCM.
21-048-15 REV. A2022-08-08. Service bulletin. AIR BAGS; ELECTRICAL SYSTEM; WHEELS. Flash: Drivetrain Control Module C2020-01 ECU Internal Fault setting in the DTCM This bulletin involves reprogramming the Drivetrain Control Module (DTCM) with the latest available software. Some vehicles may experience the All Wheel Drive Light (AWD) illuminating due to DTC C2020-01 ECU Internal Fault setting erroneously in the DTCM.
21-038-15 REV. B2022-07-25. Service bulletin. AIR BAGS; ELECTRICAL SYSTEM; WHEELS. Flash: Drivetrain Control Module (DTCM) C2020-01 ECU Internal Fault setting in the DTCM This bulletin involves reprogramming the Drivetrain Control Module (DTCM) with the latest available software. Some vehicles may experience the All Wheel Drive Light (AWD) illuminating due to DTC C2020-01 ECU Internal Fault setting erroneously in the DTCM.
21-038-15 REV. A2022-07-25. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE. Flash: Drivetrain Control Module (DTCM) C2020-01 ECU Internal Fault setting in the DTCM This bulletin involves reprogramming the Drivetrain Control Module (DTCM) with the latest available software. Some vehicles may experience the All Wheel Drive Light (AWD) illuminating due to DTC C2020-01 ECU Internal Fault setting erroneously in the DTCM.
21-048-15 REV. A2022-07-25. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE. Flash: Drivetrain Control Module C2020-01 ECU Internal Fault setting in the DTCM This bulletin involves reprogramming the Drivetrain Control Module (DTCM) with the latest available software. Some vehicles may experience the All Wheel Drive Light (AWD) illuminating due to DTC C2020-01 ECU Internal Fault setting erroneously in the DTCM.
21-038-15 REV-B2018-12-17. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Flash: Drivetrain Control Module (DTCM) C2020-01 ECU Internal Fault setting in the DTCM This bulletin involves reprogramming the Drivetrain Control Module (DTCM) with the latest available software. Some vehicles may experience the All Wheel Drive Light (AWD) illuminating due to DTC C2020-01 ECU Internal Fault setting erroneously in the DTCM.
21-038-15 REV-A2018-12-17. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM:SOFTWARE. Flash: Drivetrain Control Module (DTCM) C2020-01 ECU Internal Fault setting in the DTCM This bulletin involves reprogramming the Drivetrain Control Module (DTCM) with the latest available software. Some vehicles may experience the All Wheel Drive Light (AWD) illuminating due to DTC C2020-01 ECU Internal Fault setting erroneously in the DTCM.
21-048-15 REV-A2018-12-17. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); POWER TRAIN. Flash: Drivetrain Control Module C2020-01 ECU Internal Fault setting in the DTCM This bulletin involves reprogramming the Drivetrain Control Module (DTCM) with the latest available software. Some vehicles may experience the All Wheel Drive Light (AWD) illuminating due to DTC C2020-01 ECU Internal Fault setting erroneously in the DTCM.
21-048-152018-11-26. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Flash: Drivetrain Control Module (DTCM) C2020-01 ECU Internal Fault setting in the DTCM This bulletin involves reprogramming the Drivetrain Control Module (DTCM) with the latest available software. Some vehicles may experience the All Wheel Drive Light (AWD) illuminating due to DTC C2020-01 ECU Internal Fault setting erroneously in the DTCM.

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