Question

I have a Nissan Sentra with engine code P1491, what is the meaning of the code?

Answer 1

HI there

This code is a problem with the vacuum cut bypass solenoid. This is at the back of the car next to the charcoal canister. Here is some more info on the code for you.

P1491 NISSAN - Vacuum Cut Valve Bypass Valve

Read more: https://www.autocodes.com/p1491_nissan.html