Service bulletin SB21-024-15REVA

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10058532
Published by NHTSA	2015-10-05
Manufacturer's number	SB21-024-15REVA
Manufacturer's date	2015-09-23
Replaces	SB21-024-15REVB
NHTSA component	POWER TRAIN:AUTOMATIC TRANSMISSION; ELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

FIAT: MALFUNCTION INDICATOR LAMP (MIL) IS ILLUMINATED AND PROCEDURE PROVIDED ON TRANSMISSION CONTROL MODULE REPROGRAMMING WITH LATEST SOFTWARE *CN UPDATED 12/3/15 *CN

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Electrical system, Transmission and driveline, Automatic transmission, Software

Vehicles listed
FIAT 500	2016

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
21-055-15	2022-07-25. Service bulletin. Flash: Vehicle Will Not Shift Out Of Park This bulletin involves reprogramming the Electronic Shift Module (ESM) with the latest available software. Some Customers may experience a condition where the vehicle will not shift out of park while the engine running at idle and brake pedal applied. Cycling the ignition key off and restarting the engine will allow shift. Technicians may find DTC P0606-00 Control Module Processor. Flashing the ESM with the latest software will correct this concern.
0812215	2022-07-05. Service bulletin. This bulletin involves performing a wiTECH Misc-Function routine, for proper operation of
08-114-15 REV A	2019-05-20. Service bulletin. Radio Software Enhancements This bulletin involves updating the radio's software. CAUTION: Confirm the correct radio flash file to the applicable model and family vehicle before flashing. A customer may experience one or more of the following: ? Radio display screen intermittently may go blank. ? Radio display screen may lock up. ? Back up display may not turn off. ? Loss of radio memory for skipped channels or incorrectly displaying skipped channels in the menu list. ? Charging schedule showing in the setting menu (FF BEV only). ? Korean language was not supported (APAC - Korea only). Enhancement: ? Removing the charging schedule from showing in the setting menu (FF BEV only). ? Adding Korean language support (APAC - Korea only).
08-114-15	2019-05-20. Service bulletin. Radio Software Enhancements This bulletin involves updating the radio's software. CAUTION: Confirm the correct radio flash file to the applicable model and family vehicle before flashing. A customer may experience one or more of the following: ? Radio display screen intermittently may go blank. ? Radio display screen may lock up. ? Back up display may not turn off. ? Loss of radio memory for skipped channels or incorrectly displaying skipped channels in the menu list. ? Charging schedule showing in the setting menu (FF BEV only). ? Korean language was not supported (APAC - Korea only). Enhancement: ? Removing the charging schedule from showing in the setting menu (FF BEV only). ? Adding Korean language support (APAC - Korea only).
21-038-15 REV-B	2018-12-17. Service bulletin. 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-A	2018-12-17. Service bulletin. 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.
18-061-15	2018-11-26. Service bulletin. Flash: 1.4L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find the following Diagnostic Trouble Code (DTC) has been set in the PCM. P0141 - O2 Sensor 1/2 Heater Performance.
21-048-15	2018-11-26. Service bulletin. 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.
21-024-15 REVA	2018-11-26. Service bulletin. Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs): ? P0711 - Transmission Fluid Temperature Sensor A Circuit Range-Performance ? P1CC9 - Unable to Engage Gear ? P1D98 - Incorrect Gear Ratio Clutch B or D Defective ? P1DAD - Input Shaft-Output Shaft Direction Correlation ? U1424 - Implausible Engine Torque Signal Received In addition, the customer may also experience one or more of the following transmission related conditions: ? Less than desired 1-2 upshift on tip-in acceleration. ? Less than desired accelerator pedal response in Sport and TractionPlus modes. ? RPM flare at engine start. ? Less than desired idle performance when shifting into DRIVE or REVERSE following a cold start.
08-086-15 REV-A	2018-11-19. Service bulletin. RA2 Radio Software Enhancement This bulletin involves updating the radio software. The customer may notice a false message displayed in the Cluster; Parking Sensors Unavailable and/or Sound System Unavailable.