P0440 Toyota - Corolla

Question

Hello
I got p0440 on my Corolla 2001. But I don't know is that for the mass air flow or gas cap or charcoal canister??!! Please let me know if somebody knows the right answer..
Best Regards,
Shad

Answer 1

Hi tere

This code is not for the maf sensor. This is an emissions code. Sadly it doesn't point to one specific part of the system, so the system has to be tested. The gas cap could cause the code as well as the canister, the canister closed valve and several other parts.

When we see this code usually a smoke test is required to find the leak.