Some 2008-12 Accord and Odyssey, 2009-12 Pilot and 2010-12 Crosstour models (all with V6 engines) may intermittently turn on the check engine light and log trouble code P3400 and/or P3497 in the PCM.

Onboard diagnostics (OBD) systems have been around since the 1980s and were developed to help limit harmful automotive exhaust emissions. Between 1988 and 1995, U.S.-built vehicles came with what's ...