system to lean

lulubear · Nov 15th, 2005, 05:44 PM

i have a problem with repair my 2001 sentra. it seems my dealer doesn't know how to fix it. there are two problems in my car.

p0171 system to lean (bank1)

p0174 system to lean (bank2)

the problem is there are four of them, the dealer doesn't know which two of them are broken.

please help me...

lulubear · Nov 15th, 2005, 05:47 PM

he told me to change all of them...

that is crazy!

thestunts200sx · Nov 15th, 2005, 06:02 PM

you can check em with a volt meter, i think....and im not sure if its safer to use a analog or digital one....I forget.

I personally would change all of them....atleast yourself...doing it through the dealer or a shop for all four would be crazy expensive...but done by yourself, wouldnt be all that bad...

you have four(4) ??? I thought all cars either have 1 or 2 ....hmmmm, learn something everyday....

lulubear · Nov 15th, 2005, 06:15 PM

thanks! i will think about it.

when the first time that guy checked my engine, he was confused by those sensor too.

yup, 2001 sentra has four of them.

thestunts200sx · Nov 15th, 2005, 06:34 PM

Quote:

Originally Posted by lulubear

thanks! i will think about it.

when the first time that guy checked my engine, he was confused by those sensor too.

yup, 2001 sentra has four of them.

If you took it to a dealer, and they didnt know which of the four it was, and the guy looked confused....I would take it to another dealer....thats pretty bad.

**chimmike** · Nov 15th, 2005, 08:06 PM

have them check the exhaust manifold gaskets. Tell them to stop relying on teh damn computer and do some REAL mechanic work.

thestunts200sx · Nov 16th, 2005, 03:10 PM

Quote:

Originally Posted by chimmike

have them check the exhaust manifold gaskets. Tell them to stop relying on teh damn computer and do some REAL mechanic work.

I second that !!

kddesai98 · Apr 17th, 2006, 10:09 PM

May I know how you end up resolving the issue?

Thanks,

envirocbr · Apr 28th, 2006, 06:42 PM

You should only really have to replace the TOP TWO. The bottom two really dont make much of a difference in performance or driveability. I did my top two and it ran a little better and got a little better gas mileage. Just replace the top two.

There really only is a Exhaust leak if you have removed the Manifold before. Very rarely does that area leak on these cars

**chimmike** · Apr 28th, 2006, 09:39 PM

the bottom two will just as easily throw that code tho....and to some people, when that CEL is on, they flip out, whether it's minor or not.