Subaru Ascent 2019–2023 — technical service bulletin
Bulletin 09-107-23 · NHTSA communication 10240114 · issued Jul 18, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2019–2023
model years
5
vehicle entries
Official summary
This bulletin announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
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.