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Code 236D after A Team install

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5akman

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I get an intermitent 236D error code after my A Team install. Any ideas why?

I also have lots of oil passing through the intake system, how do I check the CDR to see if its opererating correctly?

I also just noticed a small coolant leak at the timing cover. How difficult a job is this and what has to come off the front of the engine to get the cover off?

Thanks!
 
5akman said:
I get an intermitent 236D error code after my A Team install. Any ideas why?

I also have lots of oil passing through the intake system, how do I check the CDR to see if its opererating correctly?

I also just noticed a small coolant leak at the timing cover. How difficult a job is this and what has to come off the front of the engine to get the cover off?

Thanks!
Click to expand...

CDR test and info:

http://blog.heathdiesel.com/

Did you get a tune with the ATT? Possible you are getting too much boost or computer is missing the WG by operational tests.
 
5akman said:
I get an intermitent 236D error code after my A Team install. Any ideas why?

I also have lots of oil passing through the intake system, how do I check the CDR to see if its opererating correctly?

I also just noticed a small coolant leak at the timing cover. How difficult a job is this and what has to come off the front of the engine to get the cover off?

Thanks!
Click to expand...

Isn't that the boost solonoid code? You need a boost fooler or reflash to eliminate that. It'll go off in a day or so (after a certain amount of warm/cool cycles. 4-5 or so I think)

You never coded that with the GM-X and the TM setup?

Is your module still plugged in?
 
Upper timing case cover is part of the waterpump and comes off with it. A few of the bolts IIRC are wet so it may just be a bolt leaking and removing the bolt, cleaning it and tefloning it may solve your problem if you can pinpoint your leak. Otherwise you may need to pull the waterpump. check the stupid heater hose quick connect by the term housing as well. Know leaky spot.
 
Isn't that the boost solonoid code? You need a boost fooler or reflash to eliminate that. It'll go off in a day or so (after a certain amount of warm/cool cycles. 4-5 or so I think)

You never coded that with the GM-X and the TM setup?

Is your module still plugged in?

I had the Heath ECM/TM that I installed 2 or 3 years ago with no error codes but now with the ATT, I've been getting the 236D code. I'm not sure what would trigger that code based on new injectors/glows/ATT.......
 
5akman said:
I had the Heath ECM/TM that I installed 2 or 3 years ago with no error codes but now with the ATT, I've been getting the 236D code. I'm not sure what would trigger that code based on new injectors/glows/ATT.......
Click to expand...

Contact Veg_out 1st as they can help. (I think they had a Heath program or were working with them for an ATT specific tune?)

Then call Heath if you have to. Tell em you have an ATT now and their tune. They may have an option to program out that code.

And what or how did you get that code number?

On edit new search method posted by TD gives you an answer of low boost due to ATT 'design' and need for a re-tune:

http://www.thetruckstop.us/forum/showthread.php?t=19613
 
Last edited:
Yeah, I have seen some Heath tunes where they just put it up to 10psi desried and dont disable the boost codes, but change the tolerance to about 4psi vs 2psi on the stock tune. GMx would always stay within the 10psi range plus or minus 4psi. It codes after 10 seconds of being more than 4psi off the desired curve. This is part of why I dont like most aftermarket tunes (from all that I have seen which was from most companies), they dont take into account when you shouldnt and do not want high boost while cruising, since it creates a resitriction and also takes work to spool the turbo. With the GMx and vacuum system they could drop the boost at cruising rpm/fuel rates, but they dont.
 
Buddy,
That makes some sense so perhaps that is what is happening. I have two big towing trips coming up here in June so I will see what it tows like. If bad, I'll look into the KOJO tune over the top of my Heath unit.
 
I think that is one of the differences in the GLE/4-"S" tunes. Bill wouldn't tell me what the differences were but has told people to let him know when ordering for a special version of the tunes that will work with any turbo. Maybe because If your making very little boost or 30psi you won't have to worry about boost related codes. Someone else (who I trust to know what they are talking about) told me they also have less fuel in the lower part of the fuel curve.
 
For the aftermarket tunes there is typically a jump to 14-20psi at high fuel rates on the boost mapping, so youre good anywhere from 6-20psi. With ATT you ride at 3-4psi at 30mm3 fuel rate cruising and if that way for more than 10seconds will code. I prefer to just disable that boost code, but the curve I make just matches what fuel and rpms should dicatate the boost to be, so Ive driven around fine with ATT or GM4 with homeade turbomaster no problems.
 
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