[Seamus]

Originally Posted by trixdout

So if you have cobb, switch back to stock tune, get cat ready, then go for inspection and we should be good right?

So there's actually a setting on the Cobb maps to deselect the Cat Monitor. On my protune when i told them i was Catless they updated this, which made the monitor appear NA. Im not really sure why they do this because at least where i am thats a fail. So i had them reselect the Cat monitor which set it to Not Ready, then of course after driving it went to Ready.

You should buy an ODB scanner to see if your current map with the Cobb has the Cat at NA or Not Ready/Ready. If its NA you can either go back to valet map, or pay a Protune guy to set it for you, and of course you'll get a protune too. They'd probably even just change it for a small fee i bet.

Im betting if you're using a stock map, your CAT monitor wont be NA and you'll be fine.

[PrematureApex]

Originally Posted by jamesey271975

So there's actually a setting on the Cobb maps to deselect the Cat Monitor. On my protune when i told them i was Catless they updated this, which made the monitor appear NA. Im not really sure why they do this because at least where i am thats a fail. So i had them reselect the Cat monitor which set it to Not Ready, then of course after driving it went to Ready.

You should buy an ODB scanner to see if your current map with the Cobb has the Cat at NA or Not Ready/Ready. If its NA you can either go back to valet map, or pay a Protune guy to set it for you, and of course you'll get a protune too. They'd probably even just change it for a small fee i bet.

Im betting if you're using a stock map, your CAT monitor wont be NA and you'll be fine.

It's a Cobb thing I guess.

I remember with my first WRX w/ a Cobb AccessECU back in late 2002 or so. Took it in for inspection, just about all the monitors were N/A, right down the line. The mechanic laughed and said...something tells me you knew you were going to pass...

[Bigtimers227]

Does stage 1 aggressive have the cat dissabled as well? Or is that stage 2

[jwalker87]

Trouble in paradise. After a few days of driving my car (2011 e90 335i xdrive) entered limp mode. Sort of. Said so in the dash but still had power. Got the following codes. Anyone else afflicted? This is on a car with JB4 (autoclear is off) and the BMS BEF via Cobb AP.

2D15 - O2 Sensor Delayed Response - Rich to Lean (Bank 1 Sensor 2)
2CED - O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 2)

[houtan]

Maybe the BMS BEF sets the CAT Monitor to NA?

[Seamus]

Originally Posted by jwalker87

Trouble in paradise. After a few days of driving my car (2011 e90 335i xdrive) entered limp mode. Sort of. Said so in the dash but still had power. Got the following codes. Anyone else afflicted? This is on a car with JB4 (autoclear is off) and the BMS BEF via Cobb AP.

2D15 - O2 Sensor Delayed Response - Rich to Lean (Bank 1 Sensor 2)
2CED - O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 2)

No but I did have a "pending" code initially - p2270. O2 running rich. It was not a CEL, mil still showed off. I cleared it and hasn't come back. In the meantime the monitors have been set to Ready. So I'd be golden right now.

If you can clear the codes (assuming there's no CEL) and they stay away long enough to set monitors ready I think you're fine.

Obviously if the codes are a legitimate issue that's a whole other ballgame.

[jwalker87]

Originally Posted by houtan

Maybe the BMS BEF sets the CAT Monitor to NA?

If I absolutely have to I might do that. Unfortunately to flash I have to completely remove the JB4 which takes time, and the JB4 won't run right without the BEF. So even if it is a BEF issue, I'm out of luck. Best case would be removing the JB4 and reflashing to stock every year.

I have put up a thread to Steve/Terry over at n54tech to see if the BEF affects the readiness monitors or post-cat o2 sensor in any way. We'll see.

If all the monitors got to ready before the codes showed up I might be able to use autoclear the rest of the time and just time my inspections. The whole point of this was to have a permanent solution though...

[around]

Originally Posted by jwalker87

If I absolutely have to I might do that. Unfortunately to flash I have to completely remove the JB4 which takes time, and the JB4 won't run right without the BEF. So even if it is a BEF issue, I'm out of luck. Best case would be removing the JB4 and reflashing to stock every year.

I have put up a thread to Steve/Terry over at n54tech to see if the BEF affects the readiness monitors or post-cat o2 sensor in any way. We'll see.

If all the monitors got to ready before the codes showed up I might be able to use autoclear the rest of the time and just time my inspections. The whole point of this was to have a permanent solution though...

I am confident the developer will do all they can....just work with them, they are very helpful.

[Bigtimers227]

Sorry I can't shed any light, but I've got a question myself to any problem solver lol

I can't find any layouts anywhere of the manifold on the n55 is there 4 total o2 sensors or 2 total throughout the exhaust system? I'm getting p2cf4 code and that's bank 1 sensor 1 1-3 cylinders thanks

[houtan]

Why do you think the car won't run right using the jb4 without the BEF? Tons of people run it this way. On pump fuel and map1 you should be fine.

IIRC, my buddy removed the power and ground and was able to uninstall the BEF. it's worth a shot before unplugging the harness.

Originally Posted by jwalker87

If I absolutely have to I might do that. Unfortunately to flash I have to completely remove the JB4 which takes time, and the JB4 won't run right without the BEF. So even if it is a BEF issue, I'm out of luck. Best case would be removing the JB4 and reflashing to stock every year.

I have put up a thread to Steve/Terry over at n54tech to see if the BEF affects the readiness monitors or post-cat o2 sensor in any way. We'll see.

If all the monitors got to ready before the codes showed up I might be able to use autoclear the rest of the time and just time my inspections. The whole point of this was to have a permanent solution though...

[jwalker87]

Originally Posted by houtan

Why do you think the car won't run right using the jb4 without the BEF? Tons of people run it this way. On pump fuel and map1 you should be fine.

IIRC, my buddy removed the power and ground and was able to uninstall the BEF. it's worth a shot before unplugging the harness.

No offense, but my car is not your buddy's. I've been troubleshooting a problem for years that was finally fixed last month when I bought a Cobb AP and flashed the BMS BEF. I can't run any JB4 map (other than 4 or 0) without the BEF.

Since I should technically be able to do the flashing with the JB4 on Map 0 I may try that. It didn't work to flash the car last time, but it could have been a quirk.

[jwalker87]

Originally Posted by Bigtimers227

Sorry I can't shed any light, but I've got a question myself to any problem solver lol

I can't find any layouts anywhere of the manifold on the n55 is there 4 total o2 sensors or 2 total throughout the exhaust system? I'm getting p2cf4 code and that's bank 1 sensor 1 1-3 cylinders thanks

N55 has a single turbo, therefore a single downpipe with a single catalytic converter. So 2 o2 senors, one before and one after. It is Bank 1, out of a total of 1 banks.

[PrematureApex]

Originally Posted by jwalker87

I've been troubleshooting a problem for years that was finally fixed last month when I bought a Cobb AP and flashed the BMS BEF. I can't run any JB4 map (other than 4 or 0) without the BEF.

No offense, but your didn't fix your problem then.

You simply masked it with the BEF somehow. If you can throw a JB4 on your car without the BEF, something is clearly wrong with it.

[houtan]

Originally Posted by jwalker87

No offense, but my car is not your buddy's. I've been troubleshooting a problem for years that was finally fixed last month when I bought a Cobb AP and flashed the BMS BEF. I can't run any JB4 map (other than 4 or 0) without the BEF.

Since I should technically be able to do the flashing with the JB4 on Map 0 I may try that. It didn't work to flash the car last time, but it could have been a quirk.

All good. Although, you misread my post. Reference to my buddy's car was in regards to your comment about completely removing the jb4 to uninstall the BEF. Me and my buddy had the same issue. I lucked out somehow and it worked after probably the 10th try. His kept failing and I believe simply removing power and ground was sufficient to stop the JB4 from interfering. Just recommending you try that first before unplugging the harness as that is additional work you may be able to avoid.

In regards to your car not running correctly with stock flash, my comment was there are tons of cars running the stock flash perfectly fine so I was just curious why your car wouldn't. There are even cars running stage 2 turbo and e85 on stock flash. But every car is different I guess. Good luck, hope you figure out what you need to do to get the sim to work.

[jwalker87]

Originally Posted by houtan

All good. Although, you misread my post. Reference to my buddy's car was in regards to your comment about completely removing the jb4 to uninstall the BEF. Me and my buddy had the same issue. I lucked out somehow it worked after probably the 10th try. His kept failing and I believe simply removing power and ground was sufficient to stop the Cobb from interfering. Just recommending you try that first before unplugging the harness as that is additional work you may be able to avoid.

In regards to your car not running correctly with stock flash, my comment was there are tons of cars running the stock flash perfectly fine so I was just curious why your car wouldn't. There are even cars running stage 2 turbo and e85 on stock flash. But every car is different I guess. Good luck, hope you figure out what you need to do to get the sim to work.

I'll try the only-power trick. Makes sense since the car shouldn't care about the sensor plugs while it's off, and the CAN cables in the DME aren't cut, just an additional wire spliced.

I was having issues at low-RPM WOT where the DME was throwing a fuel-mass-improbability code and entering severe limp mode. After much talk with BMS it appeared that the DME was sensing the JB4's trickery and calling the bluff. The BMS BEF upped the DME's fueling and made everything OK.

I'll update once I've reflashed to stock. Unfortunately it'll take several days to see if it comes back.

[around]

Originally Posted by jwalker87

I'll try the only-power trick. Makes sense since the car shouldn't care about the sensor plugs while it's off, and the CAN cables in the DME aren't cut, just an additional wire spliced.

I was having issues at low-RPM WOT where the DME was throwing a fuel-mass-improbability code and entering severe limp mode. After much talk with BMS it appeared that the DME was sensing the JB4's trickery and calling the bluff. The BMS BEF upped the DME's fueling and made everything OK.

I'll update once I've reflashed to stock. Unfortunately it'll take several days to see if it comes back.

Unfortunately it sounds like this problem goes deep, Many people are running only a JB4, autoclear off, catsim and everything is fine.

what model JB4 do you have ? is it possible it's the wrong unit ? or corrupted?

[jwalker87]

Looks like the backend flash is probably my problem. Scanned codes today after driving to and from work (25 miles total) and have the 2CED and 2D15 codes PENDING only. Also, my monitors are as follows:

Misfire: Ready
Fuel System: Ready
Comprehensive Component: Ready
Oxygen Sensor: Ready
Oxygen Sensor Heater: Ready
EGR System: Ready
EVAP System: Ready

The following monitors were not lit, which I think means N/A, or Not Supported.
Catalyst
Heated Catalyst
Secondary Air System
Air Conditioning

Seems to make sense that the backend flash is forcing the catalyst monitor to N/A, which is then being confused by the signal from the o2sim.

I'm going to flash back to stock and see what happens.

[jwalker87]

Originally Posted by around

Unfortunately it sounds like this problem goes deep, Many people are running only a JB4, autoclear off, catsim and everything is fine.

what model JB4 do you have ? is it possible it's the wrong unit ? or corrupted?

Pretty much the only thing I haven't tried is swapping the JB4 out. I've read about this happening to 2 or 3 other people who never got it resolved, but heard about a few others that fixed it via BEF, which is why I bought the Cobb and went that route. Just seems to be something that we don't yet understand in the N55 DME, or something that sometimes can't be fooled by the JB4 depending on the DME hardware and software version.

[Mannix]

My catsim arrived and an AA catless downpipe is already here. I will have them installed next week hopefully.

I have Dinan S2 software. So we'll see how it works.

I'll report my results.

Also, I plan to dyno the car before and after the install.

[jwalker87]

Flashed back to stock and after a few minutes of driving got another pending 2D15 code. However, Catalyst is now showing as Ready, so that's good. I think some more driving is in order, maybe the 2D15 will go away?

[Seamus]

Have you emailed a r e a 74? Checked the wiring and the light working on the io2 as it should?

Is the code causing a CEL?

[around]

Originally Posted by jamesey271975

Have you emailed a r e a 74? Checked the wiring and the light working on the io2 as it should?

Is the code causing a CEL?

if the cat shows "ready", the catsim is working.....providing the DME has the factory software.
maybe wiring ? as jamsey mentioned