Incredible Check Engine Light 2004 Impala Ideas. Too lean mixture (bank 1). Two problems related to check engine light on have been reported for the 2004 chevrolet impala.
Starting to hesitate when speeding up, rpm gage going up and down when stopped. This free video provides the steps to diagnose and clear a check engine light on a 2005 chevrolet impala ls 3.8l v6. To perform a chevy impala check engine light reset, watch:
