Service bulletin 18-039-21

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	10194054
Published by NHTSA	2021-05-24
Manufacturer's number	18-039-21
Manufacturer's date	2021-04-16
NHTSA component	ELECTRICAL SYSTEM; EXTERIOR LIGHTING

NHTSA's summary

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DTChas been set: P2110 - Electronic Throttle Control System Bank 1 - Forced Limited RPM. P2173 - High Airflow/Vacuum Leak Detected (Slow Accumulation). U0100 - Lost Communication With ECM/PCM. The following DTCs have been changed from a one trip fault to a two trip fault: P0607 - ECU Internal Performance. In addition, the customer may also experience the following: The vehicle will not crank if the ECM gets hotter than 50 °C (122°F).

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Lighting

Trouble codes named

P0607, P2110, P2173, U0100

Vehicles listed
FIAT 500X	2019

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

Recalls for the same vehicles and component
19V287000	2019-04-10. AIR BAGS: AIR BAG/RESTRAINT CONTROL MODULE; ELECTRICAL SYSTEM:SOFTWARE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
S1408000384 REV.J	2026-03-13. Service bulletin. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On
S1408000384 REV.I	2026-02-19. Service bulletin. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS Related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On
S1408000384 REV.H	2025-01-28. Service bulletin. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS Related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On
S1408000384 REV.G	2025-01-09. Service bulletin. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On
S1408000384 REV.F	2024-07-02. Service bulletin. "Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On "
S1408000384	2024-03-18. Service bulletin. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On
1000123	2024-01-16. Service bulletin. Air Bag Warning Lamp Illumination 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) has been set: ? B0050-1D - Driver Front Buckle Switch - Out of Range (Active or Stored). ? B0050-13 - Driver Front Buckle Switch - Circuit open (Active or Stored). This bulletin involves replacing the inline seat connector.
9100226	2024-01-08. Service bulletin. Connector kit Before ordering this connector repair kit 68018957A$, check it in the Mopar Connector Repair Kit Website to confirm part number and applicability. There is an error with the wiring diagrams in Service Library that is causing the incorrect repair kit part number to populate. Please use the Mopar Connector Repair Kit Website until this issue is resolved.
9100226	2023-10-30. Service bulletin. Connector kit Before ordering this connector repair kit 68018957A$, check it in the Mopar Connector Repair Kit Website to confirm part number and applicability. There is an error with the wiring diagrams in Service Library that is causing the incorrect repair kit part number to populate. Please use the Mopar Connector Repair Kit Website until this issue is resolved.
1000123	2023-10-02. Service bulletin. Air Bag Warning lamp Illumination 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) has been set: ? /B0050-1D - Driver Front Buckle Switch - Out of Range (Active or Stored). ? B0050-13 - Driver Front Buckle Switch - Circuit open (Active or Stored). This bulletin involves replacing the inline seat connector.