P0440 Bmw -

Question

2001 bmw 525i with e39 6 cylinder engine. showing code 0440. did not get gas lately and smell in cab for a few minutes. cap is on tight. where do i go from here???

Answer 1

P0440 Evaporative emission system control system malfunction

Smell like gas in the cab, regardless of this code check and inspect the fuel pump for external leaks at both side, from the fuel pump to the suction pump, These are located under the rear seat to access the fuel pump,

 From the access at the rear seat check and inspect the fuel pump from any leaks