E320 1998-P0170/ P0173 Fuel Trim Malfuction bank 1/ 2

straggler · Post by **straggler** » Thu Aug 25, 2005 11:58 am

Hi,

do any one know good site which describe how to change MAF sensor, and O2 sensor.

I have this check engin light.

Thanks

sakin_uttara · Post by **sakin_uttara** » Thu Aug 25, 2005 12:54 pm

no idea
:blue_question:

straggler · Post by **straggler** » Fri Aug 26, 2005 7:02 am

Is there are any one who changed/ clean their Mass Air Filer? I was wondering if I can clean the MAF by myself before I change it. Its expensive 450$. I would like to try to clean it first.

Post by **Darth Triad** » Fri Aug 26, 2005 11:49 pm

the O2 sensor shoulnt really be cleaned, its best to replace it, regarding the MAF, use an electrical cleaning spray.

you having idling problem? why you wanna clean/change the maf sensor?

straggler wrote:Is there are any one who changed/ clean their Mass Air Filer? I was wondering if I can clean the MAF by myself before I change it. Its expensive 450$. I would like to try to clean it first.

Post by **Monk** » Fri Sep 02, 2005 4:55 am

The AMS sits inbetween the air filter and main air intake. Its a cylindrical tube with a cap strung inside it. There's nothing to clean in it. The wire inside usu breaks causing eratic acceleration on low bands and that gets that annoying engine check light to turn on. Look inside the pipe and if the cap.'s not broken it's fine. otherwise u'd have to replace it.

If you're having fuel problem its not the AMS, its more likely a faulty fuel regulator or the pump itself. Plug it into a service mutiplexer and check.

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