TP installed, now to tackle the MIL. O2 Oxygen Sensor Simulators

[igo4uga0586]

Ive done a bunch of searching and this seems to be a viable solution to eliminating the the P0420 codes when running a test pipe or HFC. Has anyone used these before? I included about 5 different companies that I had found that offer products like this, it just doesn't seem many Audi owners have tried it. It may be a better solution than the non foulers or the spacers.

Discussion welcomed!

*******DONT BUY*******
http://www.symtechlabs.com/catalog/intelligent-oxygen-sensor-simulator-p-34.html
http://www.symtechlabs.com/catalog/images/io2ss.jpg
http://www.symtechlabs.com/support/docs/O2SimInstall3.pdf
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******BE CAREFUL*******
http://www.eletromotive.com/02Simulators.html
http://www.eletromotive.com/images/4%20.jpg
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******BEST CHOICE for completely disconnecting rear o2 sensor*********
http://www.magnumtuning.com/en/detail/adjustable-oxygen-sensor-simulator
http://www.magnumtuning.com/images_2/4_wire_wideband_simulator_Audi_A4_quattro_1.8T.jpg
================================================== ===============================
******BEST CHOICE keeping o2 sensor plugged in for heater circuit*********
http://www.magnumtuning.com/en/detail/ez-cel-fix-oxygen-sensor-simulator
http://www.magnumtuning.com/images_2/o2_sensor_Audi_A4_quattro_1.8T.jpg
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http://www.ebay.com/itm/Universal-Oxygen-Sensor-Chip-Simulator-O2-with-heater-/221332478429?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item33887199dd
http://i.ebayimg.com/t/Universal-Oxygen-Sensor-Chip-Simulator-O2-with-heater-/00/s/ODEwWDEwODA=/z/a5AAAMXQTghRKmRf/$(KGrHqF,!nkFB(E5I1zGBRKmRe6owQ~~60_12.JPG
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[texasboy21]

Forget all that and get a tune written for a testpipe/HFC.

[old guy]

Interesting concept!

Someone please correct me if I am wrong but I was under the impression that you could have the MIL trigger written out with a testpipe/HFC tune but it wouldn't necessarily pass the readiness monitors for emissions check. This approach appears to also handle the readiness monitors triggered by the downstream O2 sensor.

[Matt Devo]

Interesting concept!

Someone please correct me if I am wrong but I was under the impression that you could have the MIL trigger written out with a testpipe/HFC tune but it wouldn't necessarily pass the readiness monitors for emissions check. This approach appears to also handle the readiness monitors triggered by the downstream O2 sensor.

if it is done correctly, the tune will code out the DTC for the secondary O2 sensor as well as set the readiness state to pass. I know APR's does this, as does Motoza.

[old guy]

Thanks for the edumacation Matt!!

[igo4uga0586]

if it is done correctly, the tune will code out the DTC for the secondary O2 sensor as well as set the readiness state to pass. I know APR's does this, as does Motoza.

But a tune is $400+, and there are many out there who remain with the stock programming for a variety of reasons. This would be a $100 or less fix and a more permanent fix than spacers or non foulers

[Matt Devo]

But a tune is $400+, and there are many out there who remain with the stock programming for a variety of reasons. This would be a $100 or less fix and a more permanent fix than spacers or non foulers

I wasn't commenting for or against the solutions you posted, only to clarify old guy's post.

[texasboy21]

My question is why mod the car, but not get a tune? That's the single best mod one can do in terms of a power gain on the stock k03.

[mtbrider]

Back in the day when I first went to a test pipe the question came up as to what we could do to solve the problem. We first tried the defoulers to pull the o2 sensor out of the main flow of the exhaust, that didn't work. We then considered using something like you posted, but for me I considered the long term goals of the car and went with a custom tune. We spoke with a few people regarding using simulators and decided that adding another piece like this potentially had a issue of failure so we decided against using it for my application. Just something to think about.

[onlyaudis]

I have Revo stage two software that removes the cat error light, and 034's HFC. Passed the readiness tests the first 2 times i went through smog fine as well. But the Cat has been on there for a while now, and probably is not as efficient as when it was new. The Revo has not allowed the CEL to ever come on, but myself and a few others I know with the same set up have had some recent issues with the readiness test not showing up now. A spacer did not help at all. I may get one of these chips to try it out. which one looks to be the best design form people who know more about these things than i do?

[igo4uga0586]

I have Revo stage two software that removes the cat error light, and 034's HFC. Passed the readiness tests the first 2 times i went through smog fine as well. But the Cat has been on there for a while now, and probably is not as efficient as when it was new. The Revo has not allowed the CEL to ever come on, but myself and a few others I know with the same set up have had some recent issues with the readiness test not showing up now. A spacer did not help at all. I may get one of these chips to try it out. which one looks to be the best design form people who know more about these things than i do?

The first two look the most put together to me

[igo4uga0586]

sunday bump.....

[igo4uga0586]

Ok guys, been doing a lot of research on this and have found out some more info.

I would say don't even consider the Symtech Labs one, it appears they are either heading out of business or are doing shady business. They also have an "F" from the BBB

http://www.bbb.org/south-east-florida/business-reviews/business-services/symtech-laboratories-in-boynton-beach-fl-90057135
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The electromotive website is pretty sketchy, and their communication has been nonexistent so I would be careful.
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Magnum tuning has been very responsive from emails and such, so I would say they will be the best bet for this fix. I am personally going to go with the one that does not move the heater circuit, and just leave that installed in the TP

[03a4b6ztk]

Yes it can work. I had one on my IS300. I was able to pass emissions with. All it did was simulate the rear O2 sensors.

I spoke with the gentleman that makes these and he doesn't know that it can be done for the audi with the way the ecu reads the O2 sensors and looks for change and differences between the pre and post cat sensors which makes it difficult to simulate them.

http://www.tokensolutions.net/plug-and-play-full-o2-delete-lexus-is300-mkiv-supra/

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[onlyaudis]

please be sure to post back here if the one from Magnum tuning works out. is this the one you are planning on getting?

http://www.magnumtuning.com/en/detail/adjustable-oxygen-sensor-simulator/Audi/a4-quattro/1-8t

[daihashi]

Umm.. I just used an rai O2 spacer with a bit of steel wool in it.... no code or check engine light on my car. My readiness works fine as well.

If a tuner disables the secondary O2 check then the car will always show readiness as "ok", but it is likely to fail the actual system test.

In most states this doesn't matter because your allowed to fail 1-2 system checks and still pass inspection. In Texas for example, I'm allowed to fail up to 2.

Sent from my SGH-T999 using Tapatalk

[daihashi]

Also you may want to talk to k0mpressed on here. I remember he and I were talking about maps and hex values that could be edited in another thread. If memory serves correctly, I think he was able to get it to pass all system and readiness checks. I haven't bothered with trying to edit a raw ecu bin file in about a year, so I never gave it a try myself.

Sent from my SGH-T999 using Tapatalk

[03a4b6ztk]

Also you may want to talk to k0mpressed on here. I remember he and I were talking about maps and hex values that could be edited in another thread. If memory serves correctly, I think he was able to get it to pass all system and readiness checks. I haven't bothered with trying to edit a raw ecu bin file in about a year, so I never gave it a try myself.

Sent from my SGH-T999 using Tapatalk

Wasn't there a thread recently about k0mpressed? Something about him allegedly keeping parts that he was supposed to be working on?

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[daihashi]

Wasn't there a thread recently about k0mpressed? Something about him allegedly keeping parts that he was supposed to be working on?

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I'm not sure... I had been AWOL from the forums for most of the year up until recently. That would be kind of sad if it was true. He gave out so much information freely here on audizine and vwvortex. I'd hate to think such a helpful person turned to scamming fellow enthusiasts of their parts.

[onlyaudis]

when I tried using an O2 spacer, I actually got a cel afterwards. I think you are allowed 1 incomplete readiness test at the smog test here.

[travrach]

when I tried using an O2 spacer, I actually got a cel afterwards. I think you are allowed 1 incomplete readiness test at the smog test here.

Maybe try This (http://roc-euro.com/exhaust/oxygen-sensor-spacer.html) maker, they said they have had no issues with this unit on the 1.8T. I like it as it has a small amount of catalyst in the spacer.
I have only heard of issues using simulators on these cars.

[ddillenger]

Using spacers, or simulators is tricky business. The rear 02 is used for lambda correction as well as monitoring the catalyst's efficiency.

[03a4b6ztk]

Using spacers, or simulators is tricky business. The rear 02 is used for lambda correction as well as monitoring the catalyst's efficiency.

This is what the gentleman at Tokensolutions was telling me why its so difficult to "Simulate" the rears on any car in the VAG group.

[igo4uga0586]

Using spacers, or simulators is tricky business. The rear 02 is used for lambda correction as well as monitoring the catalyst's efficiency.

Is this true? Ive read all over AZ that the rear is only for monitoring the efficiency of the cat

[03a4b6ztk]

Is this true? Ive read all over AZ that the rear is only for monitoring the efficiency of the cat

Trust ddillinger. He can tell you down to the binary code what that sensor is monitoring.

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[ddillenger]

Is this true? Ive read all over AZ that the rear is only for monitoring the efficiency of the cat

I would need to know your software number to know FOR SURE, but yes, that statement is generally true of 00-up vehicles.

[igo4uga0586]

I would need to know your software number to know FOR SURE, but yes, that statement is generally true of 00-up vehicles.

Being safely nestled in the above '00 group, I have a question ddillenger, which is less of the three evils?

1. Leave the rear o2 alone, live with the p0420 and constant MIL due to running a TP (how does this effect lambda correction?)

2. Use spark plug non foulers / rear o2 spacers / mini cat and MAYBE get rid of the MIL (messing with lambda correction)

3. Use o2 sim and MAYBE get rid of the MIL (messing with lambda correction)

[ddillenger]

Without a properly functioning converter you may get codes in addition to the P0420.

Honestly, none of those are ideal, but if those were the only options, I'd go with number 2.

[texasboy21]

Being safely nestled in the above '00 group, I have a question ddillenger, which is less of the three evils?

1. Leave the rear o2 alone, live with the p0420 and constant MIL due to running a TP (how does this effect lambda correction?)

2. Use spark plug non foulers / rear o2 spacers / mini cat and MAYBE get rid of the MIL (messing with lambda correction)

3. Use o2 sim and MAYBE get rid of the MIL (messing with lambda correction)

4. Get a tune for a testpipe/HFC.

[igo4uga0586]

ended up not messing with the sims