P2096 2012 jetta 2.0 SOHC

[PetrolDave]

it is a brand new bosch sensor

Where did you purchase it? There are many fake ones branded Bosch...

 

[q76767]

Where did you purchase it? There are many fake ones branded Bosch...

This one came from autozone. Had a issue in another thread with rear 02 sensor amd it turned out being a bad ecu. Was geting no activity b1 s2 replaced ecu and now i have this code.

 

[Dr Sheldon]

Why not graph both O2 sensors, MAP & injector duration - Then promote change and watch reaction on the graph ?

 

[EuroX]

Still learning things the hard way I see.

 

[vwtech]

You can not buy most sensors from American aftermarket stores.
I really can't tell you why but it's kicked my ass so many times I do not do it!
They just don't speak good German!

Good Luck

 

[q76767]

europaparts in Piscataway nj is only a hour from me I'm going to call them Monday see if they have it there I can come pickup a new downstream sensor.

 

[q76767]

Why not graph both O2 sensors, MAP & injector duration - Then promote change and watch reaction on the graph ?

For o2 sensors use mvb 032 and 033 to graph them and which would I use for MAP and injector?

 

[vwtech]

Confused on measuring block 032.
They are both on 0% this happens when you clear codes they reset to 0%.
But what are they after diving awhile?
They are both LTFT (Long term fuel trim) one at idle and one at part load (driving).
STFT (Short term fuel trim) changes real fast and hard to calculate the average %.
LTFT is basically the ECU calculating the average for you because STFT changes to fast.
Once they are reset by clearing code they should relearn over time and not stay a 0% after driving.

What are the learned fuel trim of 032 after driving a long time and before clearing codes to reset LTFT?

Good Luck

 

[vwtech]

I would also like to tell you on this motor I have seen many exhaust leaks where the cat converter bolts the the exhaust manifold.
Start engine and follow the Cat 1 foot flex pipe feeling for small exhaust leaks in flex joint. Don't touch the pipe it's hot! LOL
If no leaks in flex pipe follow it up to the square 4 bolt flange at exhaust manifold.
The pipe is not welded to the flange it is a flared pressed fit no weld. Stupid!
The flared fit is known to fail and leak so feel around the square flange for a small leak.
I have had to remove Cat and weld this flange to the pipe about 6 times on this 2.0 non turbo motors.
A small leak can draw in outside air and cause down stream 02 to see a lean condition.

Good Luck

 

[q76767]

I would also like to tell you on this motor I have seen many exhaust leaks where the cat converter bolts the the exhaust manifold.
Start engine and follow the Cat 1 foot flex pipe feeling for small exhaust leaks in flex joint. Don't touch the pipe it's hot! LOL
If no leaks in flex pipe follow it up to the square 4 bolt flange at exhaust manifold.
The pipe is not welded to the flange it is a flared pressed fit no weld. Stupid!
The flared fit is known to fail and leak so feel around the square flange for a small leak.
I have had to remove Cat and weld this flange to the pipe about 6 times on this 2.0 non turbo motors.
A small leak can draw in outside air and cause down stream 02 to see a lean condition.

Good Luck

I checked that pretty well and even had smoke machine running though exhaust didn't see any leaks. I'll look again tomorrow

 

[q76767]

Confused on measuring block 032.
They are both on 0% this happens when you clear codes they reset to 0%.
But what are they after diving awhile?
They are both LTFT (Long term fuel trim) one at idle and one at part load (driving).
STFT (Short term fuel trim) changes real fast and hard to calculate the average %.
LTFT is basically the ECU calculating the average for you because STFT changes to fast.
Once they are reset by clearing code they should relearn over time and not stay a 0% after driving.

What are the learned fuel trim of 032 after driving a long time and before clearing codes to reset LTFT?

Good Luck

I'll check again tomorrow morning

 

[Dr Sheldon]

europaparts in Piscataway nj is only a hour from me I'm going to call them Monday see if they have it there I can come pickup a new downstream sensor.

You need to slow down !!

008342 - Post-Catalyst Oxygen (Lambda) Sensor Correction; Bank 1 P2096 - 000 - Too Lean

I'm not so sure it needs a sensor !! It is saying Correction - I read that as it is not necessarily dead ???

When dead you get DTC for "Ageing" "slow reaction"


Test that sensor by forcing it Rich then Lean.

You can do that by WOT then Overrun or remove it hold it in clean air and then over a cup full of Petrol !!