is the o2 sensor really faulty or is it the dredded MAF sensor, has anyone else had this? Thanks
Reply With QuoteIn our cars 02 sensor = MAF sensor. It means mass airflow. luckily its the easiest thing you can do under the hood. what model 202 do you have? most models have it not too far down the pipe form the throttle body. It's a black tube with a wire coming out of it, it's pretty obvious. There are clips on both ends that you undo and then you just pull it free. the wire is probably zip tied to the rest of the intake so just cut those ties.
The MAF looks something like this;
Its little more than some simple circuitry and a connector to the wire loom ass in a plastic tube. Pretty simple tech actually. A lot of people have good results gently spraying the element on the inside with their favorite multipurpose lubricant/cleaner like WD-40 or PB Blaster. If the MAF is just dirty then that will clean it up and after you have the code cleared you are in business. If it is actually damaged then you need to buy one.
A shot inside the MAF, that brown thing is the element that actually detects the air mass. This one is a different version so it doesn't look exactly the same. but google, whatcha gonna do?
Also a good thing to know, the BOSCH sensors are actually pretty standard so if you can't get one for your model you can get one form another BOSCH equipped car, for example I replaced my MAF with one from a land rover cause I could get it cheaper. The tube was a different diameter, but I unscrewed the sensor and put it in the old tube after cleaning it. Worked brilliantly.
Here is a writeup by some afla owners about it.
http://www.guzzimental.com/afm%20about.htm
The BOSCH MAF appears to be standard on VAG products and on Alfas as well.
Originally Posted by zmatt
