Cobb and dp fix?

[foghat]

Hey all,

I am thinking about running a Cobb tune. I am wondering how codes thrown by a dp are handled/cleared.

I know with a jb4 you can set it to clear codes. What about with a flash tune?

Thanks.

[Venom]

Originally Posted by foghat

Hey all,

I am thinking about running a Cobb tune. I am wondering how codes thrown by a dp are handled/cleared.

I know with a jb4 you can set it to clear codes. What about with a flash tune?

Thanks.

Cobb has a set of maps specifically for downpipes called stage 2 maps. I am not sure how the dpfix they use works but I have heard that its an auto clear function rather than a ready signal.

[Experimental]

From my understanding, the Cobb AP Stage 2 doesn't allow the car's emissions system to go into full ready mode. I'm not an engineer, so don't quote me. Just my loose understanding.

I will say that I went ahead and installed the BMS DPfix for those times that I need to take the stage 2 off the car.

[foghat]

So it is handled inherently by the tune/map. Good to know.

I wonder what this means then when getting a protune. Does the tuner have to do something special to make use of this 'fix'?

[benrappaport]

stage two you wont throw codes it has dp fix

[ilikebmxbikes]

my understanding is that the Cobb S2 auto clears codes, where the BMS Dp fix actually tricks the system. Cobb throws codes then erases, BMS Dp fix tricks the system and throws no codes.

[Ænema]

Originally Posted by ilikebmxbikes

my understanding is that the Cobb S2 auto clears codes, where the BMS Dp fix actually tricks the system. Cobb throws codes then erases, BMS Dp fix tricks the system and throws no codes.

Actually, it's the opposite. Cobb disables the DTC from occuring.

[Ænema]

Originally Posted by foghat

So it is handled inherently by the tune/map. Good to know.

I wonder what this means then when getting a protune. Does the tuner have to do something special to make use of this 'fix'?

When getting the car Protuned all they have to do is disable the DTC toggles. However, when getting protuned more than likely they start by using an OTS mapping most appropriate for your mods and it will already be disabled.

Of coarse, you can also disable the codes yourself in ATR.(see attachment)

[foghat]

^ awesome! Thanks for the info.

[Venom]

Does JB4 give a ready state without the DPfix?

[Ænema]

Originally Posted by Venom

Does JB4 give a ready state without the DPfix?

The JB4 just clears the CEL whenever it's triggered. Which in turn resets OBD readyness cycles. Meaning, you can't pass an OBD2 emissions test.

With the DPfix in place the DME will not throw cat ineffeciency codes. You should pass an OBD2 plugin in test but NOT a sniffer test.

Not sure if you were even asking about emissions testing, just throwing that out there.

[Tee-Dub]

Originally Posted by Venom

Does JB4 give a ready state without the DPfix?

No. I don't think the COBB gives a ready state either for OBDII emissions based testing.

[Venom]

Thanks you guys. I was debating if I should buy another Cobb down the road or if the JB4 would be enough to pass in California.

[Venom]

Originally Posted by Ænema

The JB4 just clears the CEL whenever it's triggered. Which in turn resets OBD readyness cycles. Meaning, you can't pass an OBD2 emissions test.

With the DPfix in place the DME will not throw cat ineffeciency codes. You should pass an OBD2 plugin in test but NOT a sniffer test.

Not sure if you were even asking about emissions testing, just throwing that out there.

So if I am understanding you correctly only the DPFIX would not reset the readyness cycle. But even then I would need to run tuneless for a while to get the OBC into the ready-state.

[Ænema]

Originally Posted by Venom

So if I am understanding you correctly only the DPFIX would not reset the readyness cycle. But even then I would need to run tuneless for a while to get the OBC into the ready-state.

Correct about the DPfix. However,you should be able to pass with the tune installed as long as it's in bypass mode(stage 0 for cobb) and has had enough time to complete the readyness checks.

[Venom]

Originally Posted by Ænema

Correct about the DPfix. However,you should be able to pass with the tune installed as long as it's in bypass mode(stage 0 for cobb) and has had enough time to complete the readyness checks.

Well I am running stage 2 for my DPs, so stage 0 throws CELs.

[Lambobimmer]

I use Cobb stage 2 and the DP fix and I have never had a problem passing inspection. I have had them both on for over a year.

[Ænema]

Originally Posted by Venom

Well I am running stage 2 for my DPs, so stage 0 throws CELs.

With the DP fix in it won't.

[Venom]

Misread that.
Gotcha, well I guess I gotta buy a DPfix then

[Tee-Dub]

Originally Posted by lamboworld

I use Cobb stage 2 and the DP fix and I have never had a problem passing inspection. I have had them both on for over a year.

Out of curiosity, where do you have the BMS dipfix dial set? I have one waiting to go in the car when my DP's show up, but have been reading some threads on other forums of people having some serious issues getting the DPfix set just right so it wont throw codes.

[Edogg218]

Originally Posted by Tee-Dub

Out of curiosity, where do you have the BMS dipfix dial set? I have one waiting to go in the car when my DP's show up, but have been reading some threads on other forums of people having some serious issues getting the DPfix set just right so it wont throw codes.

When I followed the instructions from BMS I would get an intermittent fuel mixture code, but setting the dial in the middle (6 'o clock, as it arrives from BMS) actually resulted in zero codes of any kind. I would start there.

[M3E46M]

I'm kind of confused. Will the DP fix affect the tune if I leave it in (connected)? Running custom stage 2 tune at the moment.

Thanks!