What type of oil you put in a 02 nissan sentra gxe

there are codes but you have to have the correct scanner and know how to set the ECM switch to get the data link to read out
get it to a specialist service center

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

Look for oil pressure sending unit. sometimes located on the side of the engine nearest the firewall. real pain to get to.

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

never wash or wet an air filter as it closes up the pores in the paper element
fit a new element and then run the fault codes or reset the ECM using a scan tool

You may have seized the engine-if your battery is fully charged and you cannot the engine to crank, the engine may be toast-try putting a socket on the crankshaft pulley ( I think it is a 24mm) and rotate it clockwise with a breaker bar-if you cannot turn it by hand, the engine is done.

02 sentra vent selector switch not working.
heat does not work either.
2002 nissan sentra gxe

good day Sir, your nissan sentra 1999 gxe have a timing chain this is some tips for your routine maintenance.
Replace engine oil
Replace engine oil filter i

First off, nothing "blows" into the air filter. It would be getting sucked in from somewhere in your engine compartment. My guess would be leaking valve cover. Check around and feel for wet oil. That will also be a leak. Have you been going through more oil than usual? Check that also. Hope that helped.