Honda Accord 2010–2011 — technical service bulletin
Bulletin Service Bulletin · NHTSA communication 10129824 · issued Feb 13, 2014
Technical service bulletin
communication type
Electrical System
component
2010–2011
model years
5
vehicle entries
Official summary
Service bulletin - The MIL is on with DTC P0420 or DTC P0430 (catalyst system efficiency below threshold) with a possible DTC P2243 or DTC P2247 (A/F sensor 1 circuit high voltage). One or both primary A/F Sensor (Air Fuel Ratio) caps may have fallen off and bored a hole through the affected WU-TWC (Warm Up Three Way Catalyst).
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.