meaudi3

I'm interested in replacing my oxygen sensors after pulling these codes:

17509 - Oxygen (Lambda) Sensor; B1 S1: Voltage too Low / Air Leak
P1101 - 35-00 - -
17514 - Oxygen (Lambda) Sensor; B2 S1: Voltage too Low / Air Leak
P1106 - 35-00 - -
16558 - Fuel Trim; Bank 2: System Too Lean
P0174 - 35-00 - -
16555 - Fuel Trim; Bank 1: System Too Lean
P0171 - 35-00 - -

It seems like everyone goes with the prefabricated bosch sensor. I have a few of the suggested generic sensors, but people have trouble with these? Its 60$ vs. 120$ a piece....
Advice? Thanks!


1995 Audi Cabriolet with 1996 AFC A4 engine.

iProDrive

You mean someone duct taped your O2 sensor too?!?!

<img src="http://i141.photobucket.com/albums/r42/mycarprojects/MY1990Audi90/air_intake/install/DSC02441_small.jpg">


Bosch vs Old Crap

<img src="http://i141.photobucket.com/albums/r42/mycarprojects/MY1990Audi90/air_intake/install/DSC02433_small.jpg">

4Driver4

Skip the O2's. You have other problems.

qezel

2nd

meaudi3

What do you mean? Those codes mean the O2's are bad right?

Lago Blue

Did they occur at about the same time? If they did, consider the chances that they would both (both sides) fail at the same approx. time. Perhaps these codes are just symptoms of some other issue, one that might be (hopefully) easier/cheaper to fix.

Have you checked the O2 sensor's outputs? Or had them checked, they may be fine and just working hard, too hard.

Go to 12v.org and read the list of corrective actions for your codes. Use it as your check-list to narrow the factory's list of possible issues.

Consider erasing the codes and see if, how and when they return. You may then possibly discern what these codes really mean.

4Driver4

Codes are clues. Do you really think that it is likely that both O2's failed in the same way at the exact same time. Maybe. But I think there is something else going on. When you get a code, you have to start diagnstics, not just replace some parts.

meaudi3

Thanks - i'm on it! I finally got the EGR codes to end so i have newfound hope.

Brdman*

look for vac leaks. those will throw O2 sensor codes.

4000fixes

i have a bosch and a denzo.. it kills me! lol