[LexLutheranM435i]

I have a 2014 435i M sport Pkg. it has a catless DP installed in it that triped the check engine light. I ordered the VRSF Catless DP Fix for N55 engines. I did hours of research before installing it. I decided to wire it on the 02 sensor side instead of into the harness. I connected it to the back 02 sensor. I spliced red wire to red wire. dp fix black wire to o2 sensor grey wire. cut the black wire on the o2 sensor. connected the dp fix yellow wire to the harness side of the black wire and the white dp fix wire to the sensor side of the black wire. no LED light was illuminated and the CEL still hasn't turned off after 2 days and 300 miles. also the glue on the dp fix is melting when the engine compartment gets hot and i smell burnt plastic. is my installation correct? why is the check engine light still on? someone please shine a little light my way. thanks in advanced!

[TreyR28]

I believe the DP fixes do not work with EWG engines. I have a 2015 335i and did research when installing my catless DP to find a way to eliminate a check engine light. I read that the DP fixes out there are only compatible with PWG engines.

I tried using a spacer when I installed mine and did not have any luck. I think that in some cases an L spacer can prevent the sensor from throwing a CEL, but it isn't guaranteed.

I think the only way to reliably remove the light on a EWG engine is to have the car tuned at a shop with the ability to disable the check engine light/sensor reading. Doing so isn't exactly legal so I wouldn't expect a shop you have never dealt with to tell you over the phone that they can disable the light.

[n55david]

Bootmod3

[LexLutheranM435i]

Originally Posted by Phantom10R

Bootmod3

what about bootmod3?

[aps]

Originally Posted by LexLutheranM435i

what about bootmod3?

are you just looking to clear the CEL? if so, then yeah bootmod3 would do that as would most tunes out there.

I suspect you're looking to pass emissions though. if that's the case, the tunes aren't going to help and the only completely fool proof way seems to be swapping back to stock DP unfortunately. from what i've read, the DP Fix from Area 74 and VRSF (same thing I believe) are hit or miss.

[LexLutheranM435i]

Originally Posted by Anshu

are you just looking to clear the CEL? if so, then yeah bootmod3 would do that as would most tunes out there.

I suspect you're looking to pass emissions though. if that's the case, the tunes aren't going to help and the only completely fool proof way seems to be swapping back to stock DP unfortunately. from what i've read, the DP Fix from Area 74 and VRSF (same thing I believe) are hit or miss.

Im looking to pass emissions I researched more on the EWG engines and realized i just wasted 100 bucks on a useless black box with wires (DP Fix) I found some things about applying the right voltage to it with resistors and all types of other wires but it seems to complicated for me. Apparently if you supply the DP Fix with the correct voltage, itll work *.

I went another route. I ordered an o2 spacer that has a mini cat in it. Basically cleans it enough before it gets to the second 02 sensor that it reads as normal. Fingers crossed! I'm hoping this works! I will update you guys! It should be delivered by today.

[fmonteiro444]

Originally Posted by LexLutheranM435i

Im looking to pass emissions I researched more on the EWG engines and realized i just wasted 100 bucks on a useless black box with wires (DP Fix) I found some things about applying the right voltage to it with resistors and all types of other wires but it seems to complicated for me. Apparently if you supply the DP Fix with the correct voltage, itll work *.

I went another route. I ordered an o2 spacer that has a mini cat in it. Basically cleans it enough before it gets to the second 02 sensor that it reads as normal. Fingers crossed! I'm hoping this works! I will update you guys! It should be delivered by today.

Where did you find that?

[LexLutheranM435i]

Originally Posted by fmonteiro444

Where did you find that?

LEDAUT 90 Degree CEL Check Engine Light Bungs O2 Sensor Socket Real Mini Catalytic Converter Inside 201 Stainless Steel https://www.amazon.com/dp/B01MTA6OXG..._OYnVBb61BH5WH

[XxThe_RemedyXx]

Another to try if this one doesn't work:

https://www.amazon.com/Vibrant-11619.../dp/B00AQ7972O

[Krofly]

Don't bother with the Vibrant spacer. I gave it a try and it didn't remove the CEL.

[LexLutheranM435i]

Originally Posted by Krofly

Don't bother with the Vibrant spacer. I gave it a try and it didn't remove the CEL.

did you find a solution?

[JaredG_F30]

I've been doing extensive research on this as well and this is what I have learned...

1. If you just want to suppress the CEL due to catless DP in the cabin then go with a tune like MHD or bootmod3
2. If you need to pass emissions the VRSF or Area 74 DP fix doesn't work with EWG
3. In most states you can pass emissions with one monitor not ready. If you live in a state that allows this then you can pass with the catless DP and stock tune. There seems to be some driving process that you have to follow after switching back to stock tune that allows for all available monitors to show ready except for the catalyst monitor but won't trip the CEL.

Cheers,

[Krofly]

Originally Posted by LexLutheranM435i

did you find a solution?

Unfortunately, I didn't find a solution.

[LexLutheranM435i]

Originally Posted by Krofly

Unfortunately, I didn't find a solution.

so mad the mini cat didnt work, back at square one. About to just get a cat . *

[F30NFifty5]

Originally Posted by JaredG_F30

I've been doing extensive research on this as well and this is what I have learned...

1. If you just want to suppress the CEL due to catless DP in the cabin then go with a tune like MHD or bootmod3
2. If you need to pass emissions the VRSF or Area 74 DP fix doesn't work with EWG
3. In most states you can pass emissions with one monitor not ready. If you live in a state that allows this then you can pass with the catless DP and stock tune. There seems to be some driving process that you have to follow after switching back to stock tune that allows for all available monitors to show ready except for the catalyst monitor but won't trip the CEL.

Cheers,

So just to be clear...I have a VRSF catted DP that is throwing a CEL code... No tune.. I know Software like Bootmod3 could clear the code, but would it leave the ECU with one monitor not ready? thats all I need to pass I believe.

[Logicoeur]

Yes the tune will do what you want. Found a couple users here who have gone through the process and passed inspection in MA. This is without doing anything illegal. So, if your state allows ONE checked monitor to show "not ready", this not the same as a FAILED readiness that throws a CEL, you should be fine.

So, hfc or catless, MHD or BM3 tune where the cat isn't monitored, and no other faults will allow you to pass.

The stock tune will always throw a CEL so you will get a failed status, and you won't pass. At that point if the station reads the failed status you will no longer be able to get through with the not ready. In MA this case will force you to have to pass with a FULL READINESS status for that monitor.

Note: the illegal act is setting the readiness to PASS or something else when it indeed isn't the case. Turning off the monitor, entirely, via tune is not illegal.

[ClevelandBeemer]

Originally Posted by JaredG_F30

I've been doing extensive research on this as well and this is what I have learned...

1. If you just want to suppress the CEL due to catless DP in the cabin then go with a tune like MHD or bootmod3
2. If you need to pass emissions the VRSF or Area 74 DP fix doesn't work with EWG
3. In most states you can pass emissions with one monitor not ready. If you live in a state that allows this then you can pass with the catless DP and stock tune. There seems to be some driving process that you have to follow after switching back to stock tune that allows for all available monitors to show ready except for the catalyst monitor but won't trip the CEL.

Cheers,

What is this process to show readiness without CEL?

[LIVY435IGC]

Originally Posted by ClevelandBeemer

What is this process to show readiness without CEL?

Do a search for bmw obdii drive cycle for smog check

[BavarianMD]

Has anyone confirmed this option #3 to work for OBD emissions testing only where 1 monitor is allowed to be "not ready"?....in this case the catalyst monitor? What is the best way to see/check your monitor readiness prior to testing? Does the BM3 dashboard give you that info? I'm going FBO w/ Stage 2 BM3 soon and just getting my ducks in a row. Thanks....I know this thread is a few months old but presumably some folks still interested in this topic. Thanks for the insights from everyone.

Originally Posted by JaredG_F30

I've been doing extensive research on this as well and this is what I have learned...

1. If you just want to suppress the CEL due to catless DP in the cabin then go with a tune like MHD or bootmod3
2. If you need to pass emissions the VRSF or Area 74 DP fix doesn't work with EWG
3. In most states you can pass emissions with one monitor not ready. If you live in a state that allows this then you can pass with the catless DP and stock tune. There seems to be some driving process that you have to follow after switching back to stock tune that allows for all available monitors to show ready except for the catalyst monitor but won't trip the CEL.

Cheers,

[TreyR28]

Originally Posted by BavarianMD

Has anyone confirmed this option #3 to work for OBD emissions testing only where 1 monitor is allowed to be "not ready"?....in this case the catalyst monitor? What is the best way to see/check your monitor readiness prior to testing? Does the BM3 dashboard give you that info? I'm going FBO w/ Stage 2 BM3 soon and just getting my ducks in a row. Thanks....I know this thread is a few months old but presumably some folks still interested in this topic. Thanks for the insights from everyone.

I think the only reliable for sure way to pass emissions is to switch out the downpipes.

Testing requirements vary by state, but I do know that Georgia does allow one sensor to be in ‘not ready’ status. However if the sensor returns a problem (this is different from not ready) that it can cause a failure. I believe in most states that a failure will require all sensors to pass before you can pass emissions. I think it is possible to pass an emissions test with a catless dp and people have done it before, but you must have all the right conditions to make it happen. Honestly it is probably easiest to just switch it out each year for the test.