dp code without tune

tomtom11 · 07-25-2013, 03:58 PM

hello, i have the jb4 and was thinking about getting a set of dp's. i understand that the jb4 has the auto code clearing so the dp code wont appear. however, if i go in for a dealer visit and turn the jb4 off or take it out, wont the dp code appear while the car is at the dealer?

deadmn1337 · 07-25-2013, 04:29 PM

Yes it will appear at the dealership so if you are having any coding done you should remove the dps and jb4 otherwise they will void your warranty if you have one still

Edit: You can buy the BMS DP fix that will make it so the codes dont show up and readiness will pass but i believe it is not recommended to leave the fix on the car.

tomtom11 · 07-25-2013, 05:00 PM

thank you very much that was literally my next question. people have said if you have the dpfix to pass inspection you should not just leave that in the car. why is that?

deadmn1337 · 07-25-2013, 08:43 PM

I'm not sure. Haven't had to do it yet myself so haven't looked into it. I think it's to allow the ecu to see exactly what is going on.

tomtom11 · 07-26-2013, 10:59 AM

hmmm... thanks, does anyone know why it is bad to leave the dp fix in the car?

tomtom11 · 07-26-2013, 10:02 PM

alright so it has something to do with the AFR. but there does not seem to be any straight answer on whether it actually has an effect on the AFR or not

tomtom11 · 08-10-2013, 10:40 PM

bump

135Hoser · 08-10-2013, 10:43 PM

Quote:

Originally Posted by tomtom11

hmmm... thanks, does anyone know why it is bad to leave the dp fix in the car?

There is some calibration of the front O2 sensors based on what the rear O2 sensors see.

Long term use of the DPFix causes long term fuel adaptations to go wonky. This can result in you running overly rich/lean, and you will run into issues.

tomtom11 · 08-11-2013, 12:00 PM

so what did people do before the jb4 came out?

135Hoser · 08-11-2013, 12:29 PM

Quote:

Originally Posted by tomtom11

so what did people do before the jb4 came out?

jb4 has been around quite some time.

Before that various flash tunes to disable the codes

Also theres the vishnu piggyback.

tomtom11 · 08-11-2013, 09:19 PM

Quote:

Originally Posted by 135Hoser

jb4 has been around quite some time.

Before that various flash tunes to disable the codes

Also theres the vishnu piggyback.

yeah i know it has been around awhile but the jb3 was out before and many people were running that with downpipes.

07-25-2013, 03:58 PM	#1
tomtom11 Captain 84 Rep 703 Posts Drives: 335i Join Date: Jan 2011 Location: Earth iTrader: (1)	dp code without tune hello, i have the jb4 and was thinking about getting a set of dp's. i understand that the jb4 has the auto code clearing so the dp code wont appear. however, if i go in for a dealer visit and turn the jb4 off or take it out, wont the dp code appear while the car is at the dealer?
	Appreciate 0 Tweet Quote

07-25-2013, 04:29 PM	#2
deadmn1337 Captain 39 Rep 656 Posts Drives: 2016 EB 435i Join Date: Mar 2010 Location: Long Beach iTrader: (11)	Yes it will appear at the dealership so if you are having any coding done you should remove the dps and jb4 otherwise they will void your warranty if you have one still Edit: You can buy the BMS DP fix that will make it so the codes dont show up and readiness will pass but i believe it is not recommended to leave the fix on the car.
	Appreciate 0 Quote

07-25-2013, 05:00 PM	#3
tomtom11 Captain 84 Rep 703 Posts Drives: 335i Join Date: Jan 2011 Location: Earth iTrader: (1)	thank you very much that was literally my next question. people have said if you have the dpfix to pass inspection you should not just leave that in the car. why is that?
	Appreciate 0 Quote

07-25-2013, 08:43 PM	#4
deadmn1337 Captain 39 Rep 656 Posts Drives: 2016 EB 435i Join Date: Mar 2010 Location: Long Beach iTrader: (11)	I'm not sure. Haven't had to do it yet myself so haven't looked into it. I think it's to allow the ecu to see exactly what is going on.
	Appreciate 0 Quote

07-26-2013, 10:59 AM	#5
tomtom11 Captain 84 Rep 703 Posts Drives: 335i Join Date: Jan 2011 Location: Earth iTrader: (1)	hmmm... thanks, does anyone know why it is bad to leave the dp fix in the car?
	Appreciate 0 Quote

07-26-2013, 10:02 PM	#6
tomtom11 Captain 84 Rep 703 Posts Drives: 335i Join Date: Jan 2011 Location: Earth iTrader: (1)	alright so it has something to do with the AFR. but there does not seem to be any straight answer on whether it actually has an effect on the AFR or not
	Appreciate 0 Quote

08-10-2013, 10:40 PM	#7
tomtom11 Captain 84 Rep 703 Posts Drives: 335i Join Date: Jan 2011 Location: Earth iTrader: (1)	bump
	Appreciate 0 Quote

08-11-2013, 12:00 PM	#9
tomtom11 Captain 84 Rep 703 Posts Drives: 335i Join Date: Jan 2011 Location: Earth iTrader: (1)	so what did people do before the jb4 came out?
	Appreciate 0 Quote