[SteveAZ]

Originally Posted by 135Pats

If I actually planned to run STG1 Drive i'd def. add more strength to the scalar.

With that said, i've now put over 30 miles on the car..All sorts of driving, stop and go, red lights, a bit of highway type speed, lots of 20-40MPH stuff...Have let the car idle cold for a few mins each start to set the evap readiness.

Zero codes so far! So unless you see a flaw in my logic, i'm going to roll the dice and head over to the testing center this evening.

I figure if it hasn't thrown any codes by now, the DP Fix is likely doing its' job and the fuel side appears to be somewhat settled down.

I'll report back tonight, cautiously optimistic

Sounds like a plan. GL

Originally Posted by danniexi

pats, are the fuel mixture you're referring to 29E0/29E1 + system bank too lean (P0171/P0174)? if so, have you changed out the injectors yet?

interestingly, after a long drive, I've gotten the mixture codes AGAIN even after changing out the plugs and injectors (as recommended by other members that have had the same issue). Been running 93 for over a year and haven't touched E85 because of these codes. Also running the OTS STG2+ aggressive.

AFR looks fine but I guess I've been lazy and haven't checked up on the LTFT which may be an issue.

Please update and let us know if changing the fuel scalar solves the issue. These codes have been plaguing my car for over a year and a half.

Post logs....those codes are almost always caused by tuning and scalar issues.

The default answers for issues seem to be plugs, coils, injectors, HPFP...but when playing with E85 and tuning...you should always log and evaluate or ask for help if needed. Especially before throwing money at the problem.

This stuff isn't all that hard, but you do need to have a decent understanding of what's going on, the proper setup, and how the car is reacting. It can be a bit confusing with all the different information floating around.

FTR, I've run 100% E85 for about 18 months now (about 14K miles) and ran E50+ for the previous 6-8 months (about 6K miles). While I've swapped a couple HPFPs around for testing, I've never had one go bad. Never changed a coil (44k on them), and still have the original NGK plugs I put in about 16K miles ago. Only things I've had go bad...1 injector shortly after I got the car when I was on E50 for leaking and a DTML pump. I suspect I got quite a bit of fuel in the vent line early on when I started working with all this stuff and it killed it.

[135Pats]

Originally Posted by danniexi

pats, are the fuel mixture you're referring to 29E0/29E1 + system bank too lean (P0171/P0174)? if so, have you changed out the injectors yet?

interestingly, after a long drive, I've gotten the mixture codes AGAIN even after changing out the plugs and injectors (as recommended by other members that have had the same issue). Been running 93 for over a year and haven't touched E85 because of these codes. Also running the OTS STG2+ aggressive.

AFR looks fine but I guess I've been lazy and haven't checked up on the LTFT which may be an issue.

Please update and let us know if changing the fuel scalar solves the issue. These codes have been plaguing my car for over a year and a half.

Yes, those are the codes in question. In a nutshell, for whatever reason the DME was struggling to properly trim fuel when I switched to a pump gas flash. Mind you, this car has seen pump gas a grand total of twice in the last year and change, so the scalar adjustment was significant.

It *appears* that i've been able to remedy this by upping the pump gas scalar to 1.1, though as Steve noted it should be stronger were I to really run this map. Since i'm just running it for emissions, I won't bother since trims are now in a safe (not optimal-but safe) range.

Now that I think about it, I don't believe the DP Fix has caused any issues at all, I mistakenly drew a causal relationship. I've now gone let's call it 30 miles with 0 codes. By now I would think O2 and catalyst monitors are "ready" or would have thrown a code.

My injectors are original from 4/08. My car handles fuel just fine on the E50 protune.

Sparknotes: Adjust scalar first and foremost if you are pegging trim and seeing lean/mixture codes.

[135Pats]

Originally Posted by SteveAZ

Post logs....you should always log and evaluate or ask for help if needed. Especially before throwing money at the problem.

This this this.

If it's one thing I learned from the FFTEC fuel pump fiasco in the Spring, it's to log log log and THINK before just throwing money at things.

I replaced the entire fuel system sans injectors hunting down that issue, I mean the whole shebang (HPFP, LPFP, fuel rail, LPFP sensor, etc etc)....And it was a flippin 20 amp fuse causing the issue.

Should have cost $3 to fix.

Brutal

[135Pats]

Edit: DMV was closed on rosh hashanah.

[135Pats]

@steveaz

Some ungood news. It took about 100 miles of driving and a complete drive cycle last night, but the car decided to throw a bank 2 mixture and those odd lambda "heating" codes I noted in the OP (P2CA9+P2CA8) just now.

To this point there haven't been any CEL or SES, but i'm going to reflash to a stronger scalar. I did a ton of highway driving this morning with somewhat modest load, so that constant fuel demand is probably what caused the mixture code to finally pop up. 2 days of putzing around the city didn't trigger anything.

SO i'll reflash to the 1.2-1.25 fuel scalars tonight and go from there. My only real concern now are those bizarre lambda heating codes. No idea if those effect readiness - FWIW they do not throw any in-dash codes etc.

No evap or catalyst inefficiency codes to this point so for all I know, the car could still be ready to pass.

[135Pats]

Originally Posted by Daily Three

wow.. i'm surprised you actually had to adjust the scalar..

Looks like I need to adjust the scalar more lol

[JunkStory]

Originally Posted by 135Pats

Looks like I need to adjust the scalar more lol

Holy shit 135Pats... I am in the EXACT same situation as you.

I have to do my emissions test by tomorrow and I am getting the 2CA9/2CA8 codes. That's how I stumbled upon this thread.

The thing is that I think I might have busted the dp fix. I tried rotating the entire dial itself by about 30 degrees clock wise, when in fact, I should have took a small flat head and just rotate the inner dial. I'm hoping that I didn't fvck up the dial because of this, and causing the 2CA9/2CA8 (previously to this my car was throwing 2C7B/2C7C) only. Now I can't get the 2CA9/2CA8 to go away.

[135Pats]

Originally Posted by JunkStory

Holy shit 135Pats... I am in the EXACT same situation as you.

I have to do my emissions test by tomorrow and I am getting the 2CA9/2CA8 codes. That's how I stumbled upon this thread.

The thing is that I think I might have busted the dp fix. I tried rotating the entire dial itself by about 30 degrees clock wise, when in fact, I should have took a small flat head and just rotate the inner dial. I'm hoping that I didn't fvck up the dial because of this, and causing the 2CA9/2CA8 (previously to this my car was throwing 2C7B/2C7C) only. Now I can't get the 2CA9/2CA8 to go away.

I mean if I clear them it's fine, they just come back. Odd thing is I can't find ANYTHING on these codes.

FWIW - they do not trip an SES or CEL. It has both "lambda" and "catalyst" in the code, so i'm not sure if it's an O2 related code or a cat related code.

The lack of any in-dash warnings leads me think it's probably the latter, cat codes trip SES lights, bottom line.

SO - i'm going to reflash to a stronger scalar tonight, that should handle the mixture codes. Will do a drive cycle and putz around some tomorrow, then try emissions. If I fail, i will let you know what monitor(s) were not in a ready state. It wouldn't shock me if these two codes don't cause issues in terms of emissions. I wasn't even aware our O2s had heaters? And my heater circuit fuse is just fine so it's not that.

Oh and my DP Fix is not broken, I haven't gotten any cat specific codes or evap codes. None of that stuff.

[JunkStory]

Originally Posted by 135Pats

I mean if I clear them it's fine, they just come back. Odd thing is I can't find ANYTHING on these codes.

FWIW - they do not trip an SES or CEL. It has both "lambda" and "catalyst" in the code, so i'm not sure if it's an O2 related code or a cat related code.

The lack of any in-dash warnings leads me think it's probably the latter, cat codes trip SES lights, bottom line.

SO - i'm going to reflash to a stronger scalar tonight, that should handle the mixture codes. Will do a drive cycle and putz around some tomorrow, then try emissions. If I fail, i will let you know what monitor(s) were not in a ready state. It wouldn't shock me if these two codes don't cause issues in terms of emissions. I wasn't even aware our O2s had heaters? And my heater circuit fuse is just fine so it's not that.

Oh and my DP Fix is not broken, I haven't gotten any cat specific codes or evap codes. None of that stuff.

This is very strange. For me, I do get the SES light on. On my Bavarian Tech tool, I detect 2CA9/2CA8 codes, and using my OBD reader I get P0161 and
P0141...

[JunkStory]

Originally Posted by 135Pats

I mean if I clear them it's fine, they just come back. Odd thing is I can't find ANYTHING on these codes.

FWIW - they do not trip an SES or CEL. It has both "lambda" and "catalyst" in the code, so i'm not sure if it's an O2 related code or a cat related code.

The lack of any in-dash warnings leads me think it's probably the latter, cat codes trip SES lights, bottom line.

SO - i'm going to reflash to a stronger scalar tonight, that should handle the mixture codes. Will do a drive cycle and putz around some tomorrow, then try emissions. If I fail, i will let you know what monitor(s) were not in a ready state. It wouldn't shock me if these two codes don't cause issues in terms of emissions. I wasn't even aware our O2s had heaters? And my heater circuit fuse is just fine so it's not that.

Oh and my DP Fix is not broken, I haven't gotten any cat specific codes or evap codes. None of that stuff.

Did you at any point try to rotate the entire dial like I did? I read in your previous post that you mentioned it seemed really difficult to rotate, which leads me to guess you might have made the same mistake as me. I wish the DIY pdf posted by BMS was a little more clear on that.

[JunkStory]

Originally Posted by 135Pats

I mean if I clear them it's fine, they just come back. Odd thing is I can't find ANYTHING on these codes.

FWIW - they do not trip an SES or CEL. It has both "lambda" and "catalyst" in the code, so i'm not sure if it's an O2 related code or a cat related code.

The lack of any in-dash warnings leads me think it's probably the latter, cat codes trip SES lights, bottom line.

SO - i'm going to reflash to a stronger scalar tonight, that should handle the mixture codes. Will do a drive cycle and putz around some tomorrow, then try emissions. If I fail, i will let you know what monitor(s) were not in a ready state. It wouldn't shock me if these two codes don't cause issues in terms of emissions. I wasn't even aware our O2s had heaters? And my heater circuit fuse is just fine so it's not that.

Oh and my DP Fix is not broken, I haven't gotten any cat specific codes or evap codes. None of that stuff.

The 2CA9/2CA8 WILL cause SES according to BT Tool's description.

[V8bait]

There's a readiness for Misfire detection, O2 heater, O2 sensor, Evap, Catalyst, and one for mechanical which is everything else (vanos aka egr, fuel trimming control, etc).

Misfire detection requires a functioning crank position sensor and changing engine speed a few times. Acceleration and cruise contribute to readiness of this monitor.

O2 monitors need to switch from rich to lean at idle often enough to pass readiness. They can also be passed when driving at steady state, low load.

Heater circuit is tested in various ways with resistance and other things I don't remember (your code could be a problem).

Evap is a pita, requires idling cold and warm at two different fuel levels for like 2 minutes (full ish and empty ish or something, I don't remember). Accelerating and holding a steady speed to evaluate purge, decelerating as well.

Vanos (egr) and fuel trimming is usually evaluated at cruise and deceleration and aren't specific tests but if there's issues the generic monitor won't be ready. As long as you have no codes for vanos or fuel trimming control/mixture you're good on this monitor probably.

Catalyst you don't have naturally but requires varied driving with some time spent in deceleration and a couple minutes spent in cruise. Without the code deleted it will FAIL readiness, which fails any test. With the code deleted it will never achieve readiness and be stuck in "not ready", which isn't necessarily a fail for a test.

[135Pats]

Originally Posted by JunkStory

This is very strange. For me, I do get the SES light on. On my Bavarian Tech tool, I detect 2CA9/2CA8 codes, and using my OBD reader I get P0161 and
P0141...

Well that's odd. It has NEVER thrown an SES or any type of in-dash warning. And regardless, if other monitors are reporting ready, these two codes alone won't fail you (at least in MD).

Originally Posted by JunkStory

Did you at any point try to rotate the entire dial like I did? I read in your previous post that you mentioned it seemed really difficult to rotate, which leads me to guess you might have made the same mistake as me. I wish the DIY pdf posted by BMS was a little more clear on that.

Yea that was me being a jackass- but I just was using my hand and twisting like two times. Not using a vice or anything crazy...so it's not broken unless it's the most fragile thing of all time.

Originally Posted by V8bait

There's a readiness for Misfire detection, O2 heater, O2 sensor, Evap, Catalyst, and one for mechanical which is everything else (vanos aka egr, fuel trimming control, etc).

Misfire detection requires a functioning crank position sensor and changing engine speed a few times. Acceleration and cruise contribute to readiness of this monitor.

O2 monitors need to switch from rich to lean at idle often enough to pass readiness. They can also be passed when driving at steady state, low load.

Heater circuit is tested in various ways with resistance and other things I don't remember (your code could be a problem).

Evap is a pita, requires idling cold and warm at two different fuel levels for like 2 minutes (full ish and empty ish or something, I don't remember). Accelerating and holding a steady speed to evaluate purge, decelerating as well.

Vanos (egr) and fuel trimming is usually evaluated at cruise and deceleration and aren't specific tests but if there's issues the generic monitor won't be ready.

Catalyst you don't have naturally but requires varied driving with some time spent in deceleration and a couple minutes spent in cruise.

Thanks as always.

Any thoughts on these specific codes? I have no idea what they are actually referencing, and they appear randomly.

I put about 100 miles of all sorts of driving on the car, and a complete drive cycle. These were the only codes that showed up (the mixture codes I will fix with a stronger scalar).

I'd think that in 100 or so miles + a drive cycle, the other monitors would either be a in a ready state, or would have thrown some type of code if the DP Fix was not doing it's job.

Thoughts? I'm going to go in tomorrow because YOLO, but I'm guessing i'll need to rely on the other monitors to pass me.

Again - No SES lights of any type related to these codes.

[V8bait]

O2 heater codes probably due to the electrical changes from the sims, or a heater burnt out, it happens. Mixture codes because the DME dislikes your hippy gas but you got that handled. With the sims you might not have to worry about the cat it might actually show readiness by now anyway, but next time just leave it out and go in with the tune that's running well with whatever fuel, it's not bmw :-)

[135Pats]

Originally Posted by V8bait

O2 heater codes probably due to the electrical changes from the sims, or a heater burnt out, it happens. Mixture codes because the DME dislikes your hippy gas but you got that handled. With the sims you might not have to worry about the cat it might actually show readiness by now anyway, but next time just leave it out and go in with the tune that's running well with whatever fuel, it's not bmw :-)

Ya the DME got real pissed at me when I flashed to a pump gas map + 1.0 Scalar. 27+LTFT for days.

The bolded is what i'm banking on. If I can "just" get it to a place where it's only those heater codes, I feel cautiously optimistic i'd pass. Nothing else has been bitchy, just these silly heater codes.

Sigh....oh emissions testing.

I'll report back tomorrow

[JunkStory]

Originally Posted by 135Pats

Again - No SES lights of any type related to these codes.

Sorry, I'm being an idiot with acronyms. I get the CEL (yellow icon), but not the SES (text). Everytime I clear the codes, the light goes away, but after a minute of driving, the CEL comes back on along with the codes, so for me the codes do directly trigger CEL.

Is the 2CA9/2CA8 (from BT Tool) same as the P0161/P0141 (from OBD reader)?

Unfortunately in Canada, a CEL is an automatic emissions test failure!

[135Pats]

Originally Posted by JunkStory

Sorry, I'm being an idiot with acronyms. I get the CEL (yellow icon), but not the SES (text). Everytime I clear the codes, the light goes away, but after a minute of driving, the CEL comes back on along with the codes, so for me the codes do directly trigger CEL.

Is the 2CA9/2CA8 (from BT Tool) same as the P0161/P0141 (from OBD reader)?

Unfortunately in Canada, a CEL is an automatic emissions test failure!

I should clarify - these o2 heater codes have NOT caused ANY type of in-dash light, warning, whatever. No SES, no CEL, nada.

The only way I can determine if they are there is to read it via Cobb or the BT cable. For what it is worth - all four of those codes appeared once and once only - the 0161/0141 codes are starting to look like a random event. I can't reproduce them in 100+ miles of driving. It's the heater codes that returned today.

So i'm not sure if there is any equivalence there. I can just report that the car is throwing these codes, they do NOT throw any type of in-dash warning or light, and they appear to be unrelated to o2 or catalyst readiness.

[135Pats]

Lol three days of driving without a peep, and all the sudden the car throws trimming bank 2 and post cast lambda probes reversed (2c6A). It's set very weak at like 7PM so IDK why it's throwing the trimming code.

I thought the yellow DP fix wires (post cat) were interchangeable into the DP Fix? Never seen that code before so obviously, they aren't reversed. That one really baffles me.

Tomorrow i'm gunna pull the DP Fix and just go to emissions as is. Enough of fiddling with this damn thing.

Edit: At least with the 1.25 scalar fuel was fine. LTFTs between -3 and 4 no matter what.

[V8bait]

Best investment is an INPA cable or even a cheapo $25 obd to bluetooth adapter with the torque app to scan your own readiness then just take it when it would pass. Much less drama :-)

[135Pats]

Originally Posted by V8bait

Best investment is an INPA cable or even a cheapo $25 obd to bluetooth adapter with the torque app to scan your own readiness then just take it when it would pass. Much less drama :-)

I hear that dude - just ordered a basic OBD monitor that checks readiness. So over this nonsense. I set the DP Fix to 10AM which is literally as weak as it can be, sliced up my hand pretty good in the process when the DME box decided to bite me.

Going to go into emissions hell or high water this week, if that doesn't work i'm putting the cats back on and dealing with it as such. I probably should have just done that from the start, could knock it out in an hour on the 1er.

Oye

[dulak]

I had those same codes once I switched over to COBB. Running STG 1 Sport in stock configuration. I eventually replace my O2 sensor and installed a catless DP at the same time. After going to COBB STG 2 Sport, all my O2/mix/temp, etc. codes went away other than what was expected (catalytic converter code).

Have you swapped out your O2 sensor yet?

[135Pats]

Originally Posted by dulak

I had those same codes once I switched over to COBB. Running STG 1 Sport in stock configuration. I eventually replace my O2 sensor and installed a catless DP at the same time. After going to COBB STG 2 Sport, all my O2/mix/temp, etc. codes went away other than what was expected (catalytic converter code).

Have you swapped out your O2 sensor yet?

I certainly could, but both post cats have about 20K on them, and again I have NEVER gotten any of these codes under any circumstances prior to the DP Fix going in.

So I find it really, really hard to believe my post cats got switched magically. Seems far more plausible that the DP Fix is set too strong and/or just hates my car.

I've set it to the absolute weakest setting possible, if it keeps fighting me i'm going to remove it all together and go from there. It's not a big deal, just annoying and a crappy use of putting miles on the car.