Acura TSX 2007–2008 — technical service bulletin
Bulletin B18100D · NHTSA communication 10146073 · issued Oct 16, 2018
Technical service bulletin
communication type
Electrical System
component
2007–2008
model years
2
vehicle entries
Official summary
Servicenews article - Is the MIL on with DTC P2271 (secondary HO2S [sensor 2] circuit signal stuck rich)? What's likely causing this is the PCM is misinterpreting the A/F sensor (sensor 1) signals, causing the PCM to think that sensor 2 is stuck rich.
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.