Chevy Cruze that runs rough idling but runs better while driving e codes P0171 and P1101

Question

Runs smooth when driving but rough when idling

Answer 1

Hi there

Both of these codes point to a faulty mass air flow sensor. One is for the sensor itself and the other is for a lean fuel mixture, which can be brought on by a bad maf sensor.

Also, check for intake manifold leaks. They can cause the rough idle and both codes as well.