changed injectors now i have a PO236 code? - Diesel Bombers



Chevy/GMC Duramax 01-04 LB7 Discussion of Chevy and GMC Trucks with LB7 Duramax Turbo Diesel Engines

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Old 05-22-2010, 08:31 PM
Diesel Fan
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Default changed injectors now i have a PO236 code?

I have a PO236 code now and dont know what to look for? or check?

I just did the injectors and the code popped up on the madian voyage.
could it be somthing it did? not reconnect, damage etc..

any help would be great!

Thank you
Joe
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Old 05-23-2010, 03:28 PM
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your boost or baro sensor could be unplugged

https://www.dieselbombers.com/chevy-...locations.html
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Old 05-24-2010, 08:50 AM
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where is the boost controll sensor? i can not tell where it is in relation to that picture in the "computers and control systems locations" you directed me too.

Joe
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Old 05-24-2010, 01:29 PM
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the boost sensor is located on the passenger side of the valley on the intake manifold, there is a small pigtail harness coming off of it. its kinda burried down there
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Old 05-28-2010, 09:39 AM
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you are the man 2500HD, it was just like you said the boost sensor plug was not snaped in all way! couple more questions

how do you know for sure that the new injectors are not failing? is there a pressure tester i can buy that will go on shrader valve that will tell me? i just want to be sure before i start driving long distance.

what is the norm oil pressure at idle and under power? mine is about 40lbs idle and close to 80lbs when on the pedal. i dont remember it spiking like that but i didnt pay that close of attention either (after all i only have the truck for 9+ years HAHA)

Joe
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Old 05-28-2010, 11:30 AM
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there is a shrader valve located next to the alternator, but that's for testing for vacuum, basicaly tells you the condition of your fuel filter.

you can do a balance rate test and some other tests, but the main thing is that it holds desired rail pressure
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Old 05-28-2010, 11:51 AM
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Quote:
Originally Posted by 2500HeavyDuty View Post
there is a shrader valve located next to the alternator, but that's for testing for vacuum, basicaly tells you the condition of your fuel filter.

you can do a balance rate test and some other tests, but the main thing is that it holds desired rail pressure
is there a way for me to check that (balance rate, and/or the rail pressure) or do i need to take it to dealer?

2500HD I saw a post that you had on here with the elevated oil pressure. what was the outcome? issue? i dont want to hurt the truck and as i said the pressure shoots up to 80lbs when on gas and 40lbs at idle

Joe
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Old 05-28-2010, 12:00 PM
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you will need a good scan tool for balance rates, i had high oil pressure, 80psi is sorta high since the oil pressure spec is something like 65 psi at 3200 rpms. from what most other dmax owners has 80 psi is normal for them too
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