Check Engine and Diff

[okpathfinder98]

My check engine light is on for the rear right O2, when I replace it will the check engine light go off after driving a while or do I need to unhook the battery for a while?

My second question is: Is there anything I can do to quiet down my noisy rear differential?

Thanks in advance

[Simon]

You'd have to reset the computer, by disconnecting the battery for 10 minutes or so, or having it reset with a scanner, or by the dealer. Some auto parts stores in the US can clear codes as well, and will do it for free.

 

First thing to do is change the fluid in your diff, if it's an LSD diff, make sure you get fluid with the LSD additive. IF that doesn't work, might be something actually wrong in there, which would require you to open it up, and have a look.

[okpathfinder98]

I plan on changing the rear diff fluid. Never really messed with this before. I have searched on here and found that I should definately remove the plug first and to use the lsd additive. What else do I need to know about doing this? How do I drain it? Torque specs? New Gasket? Any tips would be greatly appreciated.

 

99.5 Pathfinder LE 4X4

Edited October 11, 2006 by okpathfinder98

[94extreme]

take the fill plug out first. no gaskets, no other issues. get a catch basin for less mess.

[lewisnc100]

If you fix the O2 error the light will go out on its own after enough drive cycles. You don't have to clear it. If it doesn't go out then you didn't fix the error.

Edited October 11, 2006 by lewisnc100

[88pathoffroad]

A noisy rear diff is usually a sign that it's not going to last much longer. Are you sure it's the diff and not the brakes or bearings?

[okpathfinder98]

Thats a good point. Is there a way to tell if its brakes or bearings? I know the noise only happens when going slow in forward or reverse.

Edited October 12, 2006 by okpathfinder98

[okpathfinder98]

One more thing: Its definately a groaning sound it very noticeable when backing out of the driveway. It doesnt sound like the high pitched sound of squeeling brakes.