Volvo EX90 2025–2026 — technical service bulletin
Bulletin 37478.1.2 · NHTSA communication 11033737 · issued May 7, 2026
Technical service bulletin
communication type
Electrical System
component
2025–2026
model years
2
vehicle entries
Official summary
This is a TJ - Text plus 1 PDF - If a customer experiences an Electric System Limited message along with reduced performance, and there are temperature-related DTCs in the HLCM, the root cause may be restricted coolant flow to the HLCM. Please follow the advice under "Service" to test the HLCM cooling performance.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.