MAF? O2 sensor? Both?
05-31-2007, 07:27 PM
#1
AudiWorld Member
Thread Starter
Join Date: Mar 2006
Posts: 203
Likes: 0
Received 0 Likes
on
0 Posts
MAF? O2 sensor? Both?
so im getting all these misfire codes and the car is running like crap. (99 30v 115k mi) i can get more of the vag data if needed but i figured id keep this relatively short
so i hook up the VAG and start poking around
at idle the maf is reading around 9-10 g/s when it should be between like 2-5 (block 002)
also at idle the bank 2 sensor 1 reads 100 in block 030 and pretty much 0 volts in block 031.
from this it seems that the MAF and one of the O2 sensors is bad. is it possible that one could be causing the other to appear like its bad? or am i gonna have to replace both?
so i hook up the VAG and start poking around
at idle the maf is reading around 9-10 g/s when it should be between like 2-5 (block 002)
also at idle the bank 2 sensor 1 reads 100 in block 030 and pretty much 0 volts in block 031.
from this it seems that the MAF and one of the O2 sensors is bad. is it possible that one could be causing the other to appear like its bad? or am i gonna have to replace both?
06-01-2007, 06:10 AM
#3
AudiWorld Member
Thread Starter
Join Date: Mar 2006
Posts: 203
Likes: 0
Received 0 Likes
on
0 Posts
how much of a PITA is getting the o2 sensors out on a 2.8?
its probably a good idea to replace both pre-cat sensors the other one cant be too far behind.
how much crap do i have to take off to get at them?
how much crap do i have to take off to get at them?
06-01-2007, 06:13 AM
#4
AudiWorld Member
Join Date: Oct 2003
Posts: 291
Likes: 0
Received 0 Likes
on
0 Posts
If you do it from underneath, its not so bad. From the top, i think i had to remove the
air intake stuff get an extension for the socket and a breakerbar to get some leverage. It was easier than I anticipated.
06-01-2007, 06:17 AM
#5
AudiWorld Member
Thread Starter
Join Date: Mar 2006
Posts: 203
Likes: 0
Received 0 Likes
on
0 Posts
found a good write up on replacing these in the 2.8 link inside
thanks rob<ul><li><a href="https://forums.audiworld.com/a4/msgs/1894039.phtml">2.8 Oxygen Sensor Write Up</a></li></ul>
Thread
Thread Starter
Forum
Replies
Last Post
Sir Shnike
A4 (B5 Platform) Discussion
7
01-22-2007 11:26 AM