DTC P027F: General Description

Courtesy of HONDA, U.S.A., INC.

Courtesy of HONDA, U.S.A., INC.

Courtesy of HONDA, U.S.A., INC.

The cold start emission reduction strategy controls air fuel ratio to lean when the engine is started at cold condition to lower the emission while the catalyst is not warmed up enough. If the commanded air fuel ratio is too lean or too rich compared to the target air fuel ratio, the powertrain control module (PCM) detects a malfunction and stores a DTC.