Pass smog test

This is common in the Nissan's could be the cam and crank sensor these go at around 70000 to 120000 should do both at once to be safe. that will fail an emissions test for sure. hope this helps

So what failed ?

Code 440 is for a leak found in the gas tank vent system.
The computer vents the gas tank to the vapor canister and there is a leak somewhere in the system.
Sometimes it is the gas cap.

You will need to get it scanned and get the codes for the problem. If it failed the test due to emissions I would almost guarantee it will be your oxygen sensor or cat

This means you must drive the car long enough for all of the self-tests to run. Depending on the test it could be a single start and run to many cycles and many miles. Usually after about 50 miles of driving you have completed most tests.
I'm not sure where you are located, but in Ohio you can ask and have the car run on the dynamometer and compete your smog test this way.

Could be vacuum or O2 sensor maybe using cheap fuel.

REPLACE OXIGEN SENSOR AND CHECK GAS RECIRCULATED VALVE AND VACUUM LINES

check main fuse's under the hood and yes that will trip checkeng light

Hi, The Map sensor on a Suburban is located.
Beside of the ignition coil. on the intake.
Is a litle sensor with a connector of 3 wires.

I hope this work for you. OK

http://www.summitracing.com

call thier tech support to get the exact part numbers and help for installation..