2006 Acura CSX has code P0171 and engine check light on.

Question

In idling is fine but as soon as put in gear and still before you take foot of the brake it feels like is mis firing and in running is ok as soon as you come to stop starts misfiring. Looks like engine is going to turn off. But doesn't turn off still keeps runing. with engine check light is on.....

Answer 1

P0171 Fuel trim lean Bank 1

Most common cause of P0171 lean fuel trim is vacuum leak,check the PCV valve and its hose connection