Thread: Need Help on a 98' Nissan 200sx

I went to inspection two days ago and failed. I was given the P0450- Evap Emission system pressure sensor switch. I've changed the EVAP canister , Vacuum Cut Valve, and the bypass valve. The problem might be coming from the front near the engine area. How can I test the sensor switch and how can I tell if it's working?

in the 98, most of the evap emissions equipment is in the rear of the vehicle, on the driver's side.

I suggest you peruse the Factory Service Manual here: Index of /FSM/Sentra/1998_Sentra_SR

The emissions section "ec.pdf" is what you'd need to look at.