2002 nissan sentra lightis on needed fuel level sensor put it in light came back on with same code

Sensors come in different qualities and pricings. Some cheap ones made in Mexico fail in a few days. Always buy OEM quality sensors.

Your code is incorrect fuel mixture, sensor says running lean so it is dumping extra fuel.

Fuel Trim System Lean Bank 1

The code is thrown when the oxygen sensors detect that there's not enough oxygen in the exhaust system. This is commonly referred to as a "lean" condition.
The vehicle's ECM will add more fuel to the mixture in order to bring the air fuel mixture where it needs to be for optimal combustion. It also throws the code P0171 to let you know that it has done this.


Here are the typical symptoms that something is wrong when you have code P0171.

• Mileage- may or may not suffer depending on how much the air fuel mixture has changed.
• Misfire- If the air fuel mixture has gotten too far from factory specs, this can cause the Sentra to misfire.
• Idle Issues- With the air/fuel mixture altered, the vehicle can idle erratically as the computer compensates to keep the engine running.

https://www.google.com/search?q=Nissan+Sentra+code+p0171

Ideally you need an auto electrician with a pro grade scan tool...

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

po462 fuel level sensor,do you have two O2 sensors before catalytic con.Po420 will go off when you replace O2 sensors.

Well code 464 means the fuel sending unit is not sending a signal to the computer from time to time. It is not a constant problem.
My guess would be there is a problem with the wiring between the tank and the computer.

The check engine light flashes is because all check engine light codes are caused by components that affect emissions. It's not actually an engine problem, it's a problem with either your O2 sensor, MAF sensor, fuel/air ratio, pyrometer, or exhaust.
______________
galletto 2

check out the coolant temp sensor.

I have the same car and had the check engine light come on for me as well.

Mine was because I put an after market cold air intake system and I took care of my filter by cleaning and replacing it when needed. If you have this or an a filter like a K&M air filter that has a bit of oil on it will coat on the O2 sensors and will eventually interfere with your O2 sensors giving your computer the wrong information like mine did and my revs went up as well. So I had to clean my 02 sensors and and reset my computer it fixes the problem or replacing the 02 sensors will of course work too but not needed. About 3-4 years then the check engine light came back on again and I went back to my normal stocked air intake and a regular filter and no more problems. I left my exhaust header on and I still have lots of power and fuel milage, so the cold air intake didn't icrease much power or fule milage... just a tad.

Hope this helps you a little.

The other J!

SERVICE IT .....OIL PLUGS, AIR ,FUEL AND OIL FILTERS GET TROTTLE SENCOR AND THE MASS AIR FLOW SENCOR CHECKED

fix the broken wires their probably the problem then if problem still present check fuel pump.......... you can bench test it by putting power and ground to the right wires don't be scared you wont hurt anything

I think that your crank angle sensor failed. Is the check engine light on?? if so, scan it and get code. If the code is P0335, than you need new crank angle sensor. Nissan has been having some problems with those even on other Nissan products. (Altima, Pathfinder and so on) Good luck.