2002 Nissan sentra GXE trunk won't lock

Oh dear, more issues with your Sentra :>(

Valet button?

You were right...there was a little switch in the trunk.....I still don't know how it could have gotten set, but I'm good to go now

https://www.nissanforums.com/threads/trunk-wont-open-with-fob-or-trunk-release-button.138679/

https://www.justanswer.com/nissan/2nv41-06-sentra-trunk-will-not-open-neither.html

Lots more information

https://www.google.com/search?safe=off&rlz=1C1QJDB_enCA643CA644&sxsrf=ALeKk01ihYj16NJO1uAxSUqlfp02I32e4w%3A1612304278765&ei=ls8ZYIecLq6Rggfb6xs&q=2006+nissan+sentra+trunk+won%27t+open

..

link on relay
https://www.justanswer.com/nissan/2sn3q-2003-nissan-sentra-gxe-relays-the-hood-compressor-push-button.html
two fuse boxes link
https://www.youtube.com/watch?v=yIB4rlYwpjo
owners manual 03 sentra
https://justgivemethedamnmanual.com/nissan/2003-nissan-sentra-owners-manual/
Hope something here can help you

Part 1 -How to Test the Ignition COP Coils (Nissan 1.8L)

troubleshootmyvehicle.com > Nissan > 1.8L

Feb 12, 2013 - What Tools Do I Need to Test the COP Coils. ... coils (most commonly known as the COP ignition coils), on your 1.8L Nissan Sentra is pretty easy. ... When one COP ignition coil fails... that cylinder goes 'dead' due to a lack of Spark and is said to be misfiring. .... 2000, 2001, 2002, 2003, 2004, 2005, 2006 ...

Part 2 -How to Troubleshoot a No Start (Nissan 1.8L)

troubleshootmyvehicle.com > Nissan > 1.8L

Jan 17, 2013 - Checking for Spark With a Spark Tester. ... Your 1.8L Nissan will either have a distributor-type ignition system or the more modern COP ... A BAD fuel pumpwill cause your 1.8L Nissan Sentra to Crank but Not Start... since the ... Still, the other method that I've used to test for a lack of fuel... is spraying starting ...

2002 Sentra 1.8, no spark, code 0505... - Nissan Sentra Forum ...

www.b15sentra.net > ... > Technical Discussion

Nov 4, 2008 - 15 posts - ‎3 authors
I have never had a problem with the car before (02 Sentra 1.8/auto), so I had no need to post ... Originally Posted by Black B15 ... Join Date: Jun 2005 ... Can you see if the coilpacks are getting spark & work back from there? how many spark plugs do i need ? - Nissan Sentra ...
7 posts
Mar 19, 2010
Spark Plug Replacement - 2002 GXE 1.8L - Nissan ...
15 posts
Oct 12, 2009
1.8s starting problems - Nissan Sentra Forum - B15 ...
15 posts
Jun 23, 2009
No start on 1.8L 02 GXE - Nissan Sentra Forum - B15 ...
15 posts
Apr 11, 2009
More results from www.b15sentra.net

Right next to the blower motor is the resister beneath the glove box,just remove connector,then 2 screws,can't tell by looking at it if it's bad,here's a link to what it look's like. Duralast Heater Blower Motor Resistor JA1625 2002 Nissan Datsun Sentra...

What fits you car is on the white label inside the door
on the A or B pillar.

A tire store will have a listing also

The 2002 Sentra's have a timing chain.

Remove cover for storage bin under stereo. One hand on each side and pull towards trunk. Remove cup holder, pull up to remove shifter cover. The light is located under the shift indicator on the left. The black component will pull up but wire for light is short so use caution and try to remove light socket with out fully removing indicator. Light bulb is a #194 or peanut bulb. Pull bulb to remove. Reverse to reinstall.

Here is a diagram of the 1.8 exhaust from the service manual, you can obtain a full factory service manual for relatively cheap from Promanuals.net here.

buy a used unit from the junk yard.

Check for vaccume leaks and also you PCV valve. check the hose too. Visually inspect every vaccume hose you can find. Sounds like a leak .