Question

How to fix a BMW 318i 4 Cyl with the engine code P1140? Check engine light is ON

Answer 1

P1140 MAF circuit range performance problem

From the MAF sensor air duct check for any rips or tears or any vacuum leak that would affect the performance of the MAF sensor , this also includes the oil dipstick being in place and the oil fill cap being properly secured.

Answer 2

P1140 BMW Code - Mass or Volume Air Flow Circuit Range/Performance Problem

Read more: https://www.autocodes.com/p1140_bmw.html