Anyone know what this code is? Since the DTC code checker is down on this site right now, I can't find out what it is.
I started getting this code yesterday on a tune I built and have been running for almost a month.

http://www.pacificp.com/index.php?main_page=page_10&zenid=eaddc97c34f7643d7204a283d18aa6ee

look for it in there.

It's not there. However, it IS a valid code that PPE knows about. Look here:
http://www.dieselplace.com/forum/showpost.php?p=2017984&postcount=33

I read that thread... weird.

Are you getting any other codes? Does it come back when you clear it?

What sort of changes were made to the tune?

I read that thread... weird.

Are you getting any other codes? Does it come back when you clear it?

What sort of changes were made to the tune?
No other codes.
No changes have been made. I've been running this tune for about a month with no problem until yesterday.
I started the truck and the CEL was on. Cleared the code and drove home no problem.
When I started the truck this morning, CEL, same code. Cleared it, no problem. Made a stop and when I restarted the truck after about 10 minutes, CEL and same code. Cleared it and went to my next stop. When I got there I checked the codes before turning the truck off. No codes. Turned the truck off. Checked the codes...no codes. Turned the key to "on" but did not start the truck. no codes. Went in and grabbed breakfast. Came out about 15 min. later...started the truck. CEL and same code.
Do you know what the code is for?
Only thing I can speculate is that it has started to get colder here and I wonder if there is something in my tune that would care if IAT or something along the line of OAT was cooler and maybe my timing is messed up now?
I know that this morning when I first started it, it sounded a little louder while idleing. (it usually does when it's colder in the mornings) but when I cleared the code it instantly started idleing quieter...
That's all I know...
Not much huh? :lol:

I can't say I know what that code means, hopefully the sites code decypherer will up again soon. Have you tried reloading the stock tune?

P268a is a loss of the flow rates for each injector stored in the ECM and GPCM.

sounds like the information is getting dropped in the reflash.

So should I just reflash the tune into my truck?

Sounds like this might be the next chain of events.
1. reflash the tun I'm running now and see if that fixes the problem.
2. If no, reflash with my stock tun and see if that fixes the problem.
3. If no, swap out my ECM with the stock ECM that has never been touched and see if that fixes the problem.
4. If no, trip to dealer.

A man's gotta' have a plan...


seems good as any :)

1 would indicate a problem with the file in my ECM now.
2 would indicate a problem with the tun
3 would indicate a problem with my secondary ECM
4 would indicate a valid problem with the truck
No?

The problem more than likely is the new ECM...The injector flow numbers have not been loaded into it.

But I've been using this second ECM since I got EFI. Over a month without problem. I've loaded multiple tunes in it without problem and have had the tun that is now giving me a problem loaded for two weeks. I have been running it for a bout a month (without modification) but I towed a couple weeks ago so I took out my "fun" tun and put in the socal tow tun. Then I returned it to the "fun" tun. All without any problems. I've now been running my "fun" tun for a couple weeks...changed nothing...and now everytime I start the truck I get the CEL and code. That doesn't make sense does it?

How was the new ECM flashed the first time?

I bought the ECM from biodiesel66 and he flashed it. I gave him my VIN and he flashed it and sent it to me ready to go.

Maybe he can chime in and say how it was flashed...

Ross has been working through this exact same issue with another customer who is using a "spare" ECM.

It's early stages so I can't tell you why it's occurring or how to fix it because at this stage we don't know.

We will keep you updated, but it may be something you'll need to "live with" for about a month (perhaps put back your original ECM) - we leave in 3 days for SEMA and won't be back in the office for development purposes until mid November.

Cheers
Cindy

The flow rates couldnt have been put into the new ecm then. Either it has to be "copied" from the glow plug control module or the numbers taken off the injectors and entered manually.

I saw this on a truck a few weeks ago after I flashed a new tune about 3 weeks prior. We think it was from not changing the fuel filter? I check the filter with a gauge and it was almost 10 at idle. He also said the change fuel filter light came on just before I flashed the new tune. He hasn't called, that the SES is back on since it was cleared and was to of changed the fuel filter.
Just a thought?

Ross has been working through this exact same issue with another customer who is using a "spare" ECM.

It's early stages so I can't tell you why it's occurring or how to fix it because at this stage we don't know.

We will keep you updated, but it may be something you'll need to "live with" for about a month (perhaps put back your original ECM) - we leave in 3 days for SEMA and won't be back in the office for development purposes until mid November.

Cheers
Cindy

Awesome, does that mean the new release is out for us to download??!?!!?!?

Awesome, does that mean the new release is out for us to download??!?!!?!?

Not yet - Ross is still working on the next release. He will package up what he needs to do and will send it to Paul before we leave first thing Tueday our time (Monday afternoon for you guys), Paul will then add his bits and pieces - including the fix for the error you reported in another thread, and then post a full release. Paul leaves Friday your time, so it will be before then.

Cheers
Cindy

Maybe he can chime in and say how it was flashed...

They came flashed from GM with the 12606128 OS preloaded.

Sounds like this might be the next chain of events.
1. reflash the tun I'm running now and see if that fixes the problem.
2. If no, reflash with my stock tun and see if that fixes the problem.
3. If no, swap out my ECM with the stock ECM that has never been touched and see if that fixes the problem.
4. If no, trip to dealer.

I did steps one two and three.
1. same results: CEL at startup and same code
2. same as above
3. no problem.
So at this point it looks like a problem with the spare ECM.
Should I try anything else or would you say the same?
Biodiesel66?
The fuel filter has about 3K miles on it. I can change it but I'm not convinced that is it since the factory ECM isn't showing the same problem.
Where do we go from here?
BTW, thanks to all who have responded. It's nice to have others help when you are having problems. thanks.

I did steps one two and three.
1. same results: CEL at startup and same code
2. same as above
3. no problem.
So at this point it looks like a problem with the spare ECM.
Should I try anything else or would you say the same?
Biodiesel66?
The fuel filter has about 3K miles on it. I can change it but I'm not convinced that is it since the factory ECM isn't showing the same problem.
Where do we go from here?
BTW, thanks to all who have responded. It's nice to have others help when you are having problems. thanks.
The steps you've tried are what we've already done in testing. At this stage Ross needs to put in some more hours to come up with some alternative options - I can say with some certainty that it's not going to be fixed today or tomorrow.

I'll keep you posted.

Cheers
Cindy

P268A "Fuel Injector Calibration Not Programmed" Non Emissions Related, MIL On from the factory.

Can't say if it's the ECM or not.

I don't know enough about these ECMs. I don't know how the other control modules communicate with the ECM. Ex. oil life and fuel filter. I would think the ECM would do that task.
LB7 you can change the oil life based on mileage. If the LB7 ECM is in need for a reset and the other ECM is not. The ECM that needs to be reset will give you the fault. That could be what you are seeing when you put the OEM back in? Not the answer just a thought.


I'll see if I can duplicate the problem with one of the ECMs. I don't know how long it will take for that code to appear.

Not yet - Ross is still working on the next release. He will package up what he needs to do and will send it to Paul before we leave first thing Tueday our time (Monday afternoon for you guys), Paul will then add his bits and pieces - including the fix for the error you reported in another thread, and then post a full release. Paul leaves Friday your time, so it will be before then.

Cheers
Cindy

You guys are incredible at what you do, thank you guys so much! Can't wait for the newest release!!!

The injector flow rate needs to be programmed into the new ECM. Put the stock program in the spare ECM (the one for EFI), go to the dealer and ask them to perform a fuel injector flow rate programming on the ecm.

Give them this document id# 1647659

That will take them how to do it.

The injector flow rate needs to be programmed into the new ECM. Put the stock program in the spare ECM (the one for EFI), go to the dealer and ask them to perform a fuel injector flow rate programming on the ecm.

Give them this document id# 1647659

That will take them how to do it.
I took it in and you are exactly right. They programmed my injector flow rates and that seems to have taken care of it... :thumb:
Thanks!!

i take it they are using a tech 2 for this cobra?

Yes tech II. I never noticed a table in EFI to do it, might have to make it a table request.

if a person installed different injectors would it be worth getting the tech 11 to do this also? in your opinion?

Just different stock injectors then yes

different injectors that flow more than stock, not sure, never looked to close at the numbers to see if something determined how much fuel the injector flowed in the numbers.

The injector flow rate needs to be programmed into the new ECM. Put the stock program in the spare ECM (the one for EFI), go to the dealer and ask them to perform a fuel injector flow rate programming on the ecm.

Give them this document id# 1647659

That will take them how to do it.
Thanks Cobra#3747 you were right on the money. The tech was going to get the info from the injectors, I guess you saved him some time. I'ts nice to see a clean dashboard without SES lights on.

Glad it all worked out