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Service bulletin 37446

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 id11021927
Published by NHTSA2025-08-18
Manufacturer's number37446
Manufacturer's date2025-07-18
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

This is a Technical Journal: PDS Error 502 – Extra SW May Be Needed. If error 502 appears in VIDA when ordering PDS software, please perform an EVCC reload with the checkbox marked "YES" for new hardware.
 EVCC reload part number: 80012578

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

Vehicles listed
VOLVO EX302026

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
37436.4.02026-10-05. Service bulletin. This is a Technical Journal: Vehicle Fails to Charge on All AC and DC Chargers. Start fault tracing by checking the following: 1.The condition of the EVI for damage and/or foreign objects. - Sample images can be found on page 1 of the attached PDF file. 2.The connectors at the CDD: unplug, then plug them in again. - Relevant connectors are numbers 1, 2, 6, and 9 on the drawing on page 2 of the attached PDF file. If no deviations are found at the EVI or the connectors at the CDD, continue fault tracing in VIDA.
37435.2.02026-10-05. Service bulletin. This is a Technical Journal: Vehicle Fails To Charge On Certain DC Chargers. Check if the vehicle's software is the latest version. If not the latest version, please perform a Total Upgrade
37436.4.02026-10-05. Service bulletin. This is a Technical Journal: Vehicle Fails to Charge on All AC and DC Chargers. Start fault tracing by checking the following: 1.The condition of the EVI for damage and/or foreign objects. - Sample images can be found on page 1 of the attached PDF file. 2.The connectors at the CDD: unplug, then plug them in again. - Relevant connectors are numbers 1, 2, 6, and 9 on the drawing on page 2 of the attached PDF file. If no deviations are found at the EVI or the connectors at the CDD, continue fault tracing in VIDA.
374362026-01-07. Service bulletin. This is a Technical Journal: Vehicle Fails to Charge on All AC and DC Chargers. Start fault tracing by checking the following:
 1.The condition of the EVI for damage and/or foreign objects.
 - Sample images can be found on page 1 of the attached PDF file.
 2.The connectors at the CDD: unplug, then plug them in again.
 - Relevant connectors are numbers 1, 2, 6, and 9 on the drawing on page 2 of the attached PDF file.
 If no deviations are found at the EVI or the connectors at the CDD, continue fault tracing in VIDA.
374302025-08-18. Service bulletin. This is a Technical Journal: No Start After Failed OTA Installation. Do not replace any parts.
 To recover the CEM, download SP 80026889, "OTA RESTORE".
 After this has been installed, confirm that the car can now be started and driven.
 Ensure that the car has the latest software by following TJ-31543
374362025-08-18. Service bulletin. This is a Technical Journal: Vehicle Fails to Charge on All AC and DC Chargers. Start fault tracing by checking the following:
 1.The condition of the EVI for damage and/or foreign objects.
 - Sample images can be found on page 1 of the attached PDF file.
 2.The connectors at the CDD: unplug, then plug them in again.
 - Relevant connectors are numbers 1, 2, 6, and 9 on the drawing on page 2 of the attached PDF file.
 If no deviations are found at the EVI or the connectors at the CDD, continue fault tracing in VIDA.
374352025-08-18. Service bulletin. This is a Technical Journal: Vehicle Fails To Charge On Certain DC Chargers. Check if the vehicle's software is the latest version. If not the latest version, please perform a Total Upgrade