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Miltek Downpipe intstall now I have an o2 sensor light
Im very new to the site so dont beat on me too bad. I just put a milltek catted downpipe on my 12 countryman along with some other mods (intake piping before and after the intercooler) and now I get a check engine light for the bank 1 upstream o2 sensor. I took EXTRA care removing and installing the sensor and everything stayed in tack. I was wondering if the downpipe could be the issue?
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Yes the large diameter DP will throw a CEL (in most cases), a tune will rectify that. If you have any other exhaust mods you want to do, have them done and then have your DME sent out. I hear most tuners have quick turn-arounds.
They also sell O2 Spacers which could eliminate the CEL. It's worked but not a guaranteed fix. |
Just wanted to add that is completely normal.
If you want it off, get a tune. |
If I already have a tune and add this will I still get the warning light?
Originally Posted by spoolinturbo
(Post 4320841)
Yes the large diameter DP will throw a CEL (in most cases), a tune will rectify that. If you have any other exhaust mods you want to do, have them done and then have your DME sent out. I hear most tuners have quick turn-arounds.
They also sell O2 Spacers which could eliminate the CEL. It's worked but not a guaranteed fix. |
Originally Posted by Markbett
(Post 4330000)
If I already have a tune and add this will I still get the warning light?
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MANIC MINI Stage 1 ECU Tune
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You said you have an upstream fault? That would be the pre cat sensor. So that fault shouldn't have anything to do with your downpipe. So that needs to be diagnosed just like a stock car.
Now if you have the fault for the downstream sensor after the cat then that is caused by the downpipe and you will need a tune to not have the light on. We can do the tune for you if you want to send over the ECU https://www.waymotorworks.com/perfor...e-r60-r61.html It is perfectly normal to get post cat or cat efficiency faults after installing a downpipe as they all cause a light and require a tune to avoid. |
Originally Posted by Markbett
(Post 4330042)
MANIC MINI Stage 1 ECU Tune
mQubed Motorsport, Manic Tuning Dealer |
UPDATE: for anyone who cares or follows this. I have been working with a tuning shop for my cel with no luck because they are super busy and somehow cannot find time to get a paying customer into their shop. However my light only comes on when I drive the car on longer highway drives or longer rides in which case I carry my scanner and just turn it off. I have just found a product that seems to be sent from the gods and hopefully will work. It is an 02 sensor spacer with a mini catalytic converter built into it so you can run catless or high flow cats without a tune and WITHOUT THE CEL. I just ordered it and have never seen anything like it but I will come back with a link once I install it to see if it works.
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Generally speaking, these don’t work very well. The import guys love them, but they don’t address your root problem for the CEL. Shops are slammed this time of year, but you deserve a solution. Don’t give up - Please post up YOUR findings.
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Originally Posted by R56devotion
(Post 4332779)
Generally speaking, these don’t work very well. The import guys love them, but they don’t address your root problem for the CEL. Shops are slammed this time of year, but you deserve a solution. Don’t give up - Please post up YOUR findings.
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Originally Posted by countrymanwot
(Post 4333316)
I know what is wrong with the car it is my upgraded downpipe. So to run the downpipe without the CEL until I get a tune I will try the catted spacer in the meantime.
UPDATE: I am running the O2 sensor spacer with the cat in it that I paid $50 for and it has cleared my engine light |
Originally Posted by countrymanwot
(Post 4355241)
UPDATE: I am running the O2 sensor spacer with the cat in it that I paid $50 for and it has cleared my engine light |
Originally Posted by njaremka
(Post 4355262)
Which spacer did you use? Link?
https://www.outmotoring.com/mini-cat...or-spacer.htmlThis is the one I used. It’s for an r53 but it still works. It probably won’t fit a factory heat shield because it’s pretty big. At first the car didn’t like it but I decided to try it out a few days watching the air fuel and a few other parameters on a scanner to make sure everything was ok and it was so I kept it and I cleared the light and it never came back |
Is this on the upstream or downstream sensor?
Previously you stated upstream (what would be the precat sensor on a stock downpipe). Can you clarify? |
I put it on the pre cat sensor because that’s the one I had a code for. And I’m not sure what you mean by what the stock one is? It’s a Bosch manufacturer
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The AFR readings (that I assume) you are reading via the OBD2 port may or may not be accurate with this device installed.
People don't normally get codes on the pre-cat sensor after the installation of a catless downpipe. Altering the installation of the pre-cat sensor can be risky. How this device affects the actual AFR readings is anyone's guess. You may want to reevaluate your "solution" to the problem. What is the code that you are getting? |
Originally Posted by cerenkov
(Post 4355405)
The AFR readings (that I assume) you are reading via the OBD2 port may or may not be accurate with this device installed.
People don't normally get codes on the pre-cat sensor after the installation of a catless downpipe. Altering the installation of the pre-cat sensor can be risky. How this device affects the actual AFR readings is anyone's guess. You may want to reevaluate your "solution" to the problem. What is the code that you are getting? Yes I understand that and I am aware of all of that it was a P0420 code and that’s what cleared it for a short time until I can get to someone who does maniac tunes or has software to tune it because no one local to me is able too so until then the light is off |
If I'm not mistaken the p0420 code is the efficiency code and triggered by the catless downpipe because the upstream and downstream sensor are reading very similar.
It really has nothing to do with the upstream sensor. Move the device to the downstream sensor. To clarify, the upstream sensor is closest to the turbo while the downstream sensor is below the car. The Manic tune will definitely solve the issue. |
Originally Posted by cerenkov
(Post 4355557)
If I'm not mistaken the p0420 code is the efficiency code and triggered by the catless downpipe because the upstream and downstream sensor are reading very similar.
It really has nothing to do with the upstream sensor. Move the device to the downstream sensor. To clarify, the upstream sensor is closest to the turbo while the downstream sensor is below the car. The Manic tune will definitely solve the issue. |
What is your reasoning for installing the device on the upstream sensor?
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Anyone tried this product for the downpipe CEL issue?
http://www.magnumtuning.com/en/detai...nsor-simulator |
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