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 ...

Some 2007-08 Honda Civic models may illuminate the Check Engine light and store trouble code P0456 (EVAP system leak) in the PCM. One likely cause, reports Honda, is an internal glitch in the canister ...