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Old 08-15-2003, 06:20 PM   #1
Unabomber
Big Ron
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Exclamation Cobb "extra features"

I received my AccessECU for my 04 this week. I had two special features added that may provide info to others.

1. Turn off the uppipe EGT CEL. Even if you have them do this, you still need something in the EGT plug for a return signal. I removed my resistor and got a CEL. After re-installing it, no CEL because of it so far. I was told resisitor or a straight jumper would work.

2. Turn off the rear O2 CEL. They don't do this per se. They widen the parameters of the CEL so if your state does OBD II scanning, you will still pass. Apparently, if they delete it, the OBD II scanners can detect it and zap you for it. Well, my car is the first out of 50 04 AccessECUs they have done to throw this code. My luck = teh suck! I was under the false assumption that their fix would be final and permanent. Apparently 1 in 50 P0420 CEL issue remains true for their other year models as well. So if you have them "fix" this issue with your car, you may get a P0420 as well. If you do, you gotta live with it. They did say that they are still working on it and I could get a reflash or use the AccessPort when it comes out if/when they resolve this CEL issue.

These aren't necessarily negative findings on my part, only some information. I would still have gotten the AccessECU if I had known these "issues".
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Old 08-15-2003, 09:21 PM   #2
Jon [in CT]
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Default Re: Cobb "extra features"

Quote:
Originally posted by Unabomber
2. Turn off the rear O2 CEL. They don't do this per se. They widen the parameters of the CEL so if your state does OBD II scanning, you will still pass. Apparently, if they delete it, the OBD II scanners can detect it and zap you for it. Well, my car is the first out of 50 04 AccessECUs they have done to throw this code. My luck = teh suck! I was under the false assumption that their fix would be final and permanent. Apparently 1 in 50 P0420 CEL issue remains true for their other year models as well. So if you have them "fix" this issue with your car, you may get a P0420 as well.
This is very disappointing given than previous posts by Oman have suggested that Cobb Tuning has completely deciphered the ECU's microcode and given that 2004 factory service manuals spell out in great detail the prerequisite conditions that that must be met before setting the P0420 (Catalyst Inefficiency) diagnostic trouble code (DTC).
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Old 08-16-2003, 01:25 PM   #3
scoobiejosh
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We generally don't entirely disable the check engine codes because you'd still want to know when something goes completely wrong. I threw a cat inefficiency code on my personal ecu once on a road trip when I got bad gas. (I could tell the gas was crap because of the way the car was bucking) and it went away after a fresh tank. I thought this was perfectly adequate

Anyways... if you want the codes removed entirely just let me know via email and I'll take care of it personally. (I don't do the day to day flashes very often anymore)

John

(oman)

Woops.. forgot that if Iposted on Josh's computer that it would post under his name
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Old 08-16-2003, 05:29 PM   #4
Unabomber
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Thanks for the response Oman! Your information is true and very valid. The only sticking point is that this information isn't listed anywhere. Not on this site or your site. None of it is bad news by any means, just something to be aware of. I really wouldn't have cared so much, but the CEL combined with my leaky uppipe made for a not fun day. At least I know where the leak is now and know better than to buy/use the "high tech, graphic based, NASA approved, composite, whizz-bang gaskets" anymore! OEM ownz gaskets.
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