Honda Accord 2010 — technical service bulletin
Bulletin DLR MSG - RFV, R · NHTSA communication 10128539 · issued Jul 25, 2014
Technical service bulletin
communication type
Electrical System
component
2010
model years
1
vehicle entries
Official summary
Dealer message - American Honda (AHM) is investigating certain 2010 Accord L4 with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0420 (Catalyst System Efficiency Below Threshold) stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.
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.