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Service bulletin S2018000004

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)
TypeService bulletin
NHTSA id10175670
Published by NHTSA2020-05-26
Manufacturer's numberS2018000004
Manufacturer's date2020-04-15
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Issue includes a fault code set in the powertrain control module (PCM ) for U04B1-00-Invalid Data Received From Battery Monitor Module after flashing PCM for Customer Satisfaction Notification (CSN) W05.

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

Trouble codes named

U04B1

Vehicles listed
ALFA ROMEO GIULIA2017 to 2019
ALFA ROMEO STELVIO2018, 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
19V5510002019-07-25. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
18V6360002018-09-14. ELECTRICAL SYSTEM:WIRING; ENGINE AND ENGINE COOLING:ENGINE
20181502018-03-29. Electrical

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
22D Combo Rev12026-09-17. Warranty extension. Emissions Recall 22D - On Board Diagnostics - Dealer Notification (Revision 1)
22D Combo2026-09-10. Warranty extension. Emissions Recall 22D - On Board Diagnostics - Dealer Notification
S26230000372026-06-03. Service bulletin. Condensation Or Water Infiltration In Headlights, Daytime Running Lights (DRL), Turn Signals, Fog Lights, Taillights.
S1408000384 REV.J2026-03-13. 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.I2026-02-19. 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
08-394-25 REV. A2025-12-17. Service bulletin. Telematics Box Module (TBM) Backup Battery Replacement When DTC B1E21 Is Present Technicians may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC): ● B1E21-96 - Backup Battery Component Internal Failure.
91007342025-12-17. Service bulletin. If the DTC B1E21-96: Backup Battery-Component Internal Failure is active and customer states Popup message will show at the radio: "Battery of Uconnect Box requires service. SOS call and related functions may be unavailable. Please visit an authorized dealer." PLEASE do not Replace the TBM module, only replace TBM Internal Battery (inside Telematics Box Module) and order PN68493347
08-394-252025-12-11. Service bulletin. Telematics Box Module (TBM) Backup Battery Replacement When DTC B1E21 Is Present echnicians may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC): ● B1E21-96 - Backup Battery Component Internal Failure
S1408000384 REV.H2025-01-28. 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.G2025-01-09. 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