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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 29494
Experience:  GM Grand Master Technician 2007. 14 years experience.
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03 Durmax 6.6 getting code 2227 & 1404 New EGR Checked

Customer Question

03 Durmax 6.6
getting code 2227 & 1404
New EGR
Checked solenoids - all good
but they are not working
good vacuum from pump
when I ground solenoids EGR opens
checked PCM pins & all looks good, ground is there @ pink wire
1404 EGR closed position performance
2227 Barometric pressure circuit range / performance
Submitted: 1 year ago.
Category: Chevy
Expert:  GM Tech (Cam) replied 1 year ago.

Hi there, I am Cam. Can I get your name please while I pull up information on that code?

Expert:  GM Tech (Cam) replied 1 year ago.

Do you have a hand vacuum pump to do some testing with?

Customer: replied 1 year ago.
AJ
Expert:  GM Tech (Cam) replied 1 year ago.

OK AJ, did you have a hand vacuum pump to test with?

Expert:  GM Tech (Cam) replied 1 year ago.

Also looking at the combination of codes, its possible the vacuum hoses on the EGR control solenoid are backwards, Did you happen to check those?

Customer: replied 1 year ago.
NO, I grounded the solenoids and the egr opened
Customer: replied 1 year ago.
The pump has 14.5 in of vacuum
Customer: replied 1 year ago.
I assumed that the hoses were correct
Customer: replied 1 year ago.
when solinoids grounded the valve opened
Expert:  GM Tech (Cam) replied 1 year ago.

OK, If you use a hose on the control solenoid, not the EGR valve, one will allow vacuum through all the time and the other will block flow. Does the one that blocks flow go to the valve or the pump?

Expert:  GM Tech (Cam) replied 1 year ago.

DO you have a code chart or the diagnosis for this code? If not, open the link below.

Customer: replied 1 year ago.
I'm going to check that now
Customer: replied 1 year ago.
Bingo, the blocked port goes to pump
Customer: replied 1 year ago.
still getting closed valve reading when I switch hoses
Expert:  GM Tech (Cam) replied 1 year ago.

OK, so it was backwards or it was not flowing at all?

Customer: replied 1 year ago.
I need to check vacuum on other port after switching hoses
Expert:  GM Tech (Cam) replied 1 year ago.

At a start yes. Also do you have a scanner that reads live data? We will end up needing to follow those instructions in the chart to find the issue if the hoses are ok.

Customer: replied 1 year ago.
Sorry, I somehow misplaced key, looking now
Customer: replied 1 year ago.
ok, there is no vacuum from other port. But, the solenoid is opened through voltage, right ?
Customer: replied 1 year ago.
We have plenty of vacuum but the solenoids do not open. I'm thinking there is an electrical issue
Expert:  GM Tech (Cam) replied 1 year ago.

Its possible, but we need the computer to command it open, thats why we need the scanner to command it open.

Customer: replied 1 year ago.
I have a scanner. However, I'm not that familiar with it
Customer: replied 1 year ago.
Ok Cam, I just read the component section and fallowed the instructions. Unfortunately the mode is not supported
Expert:  GM Tech (Cam) replied 1 year ago.

Ok, does your scanner show live data of anything or is it only codes?

Customer: replied 1 year ago.
It has live data
Expert:  GM Tech (Cam) replied 1 year ago.

Ok, in KPA, with the engine off but key on, what does the Baro and MAP sensor read?

Customer: replied 1 year ago.
No Baro, MAP is 29.8
Expert:  GM Tech (Cam) replied 1 year ago.

Thats in KPA or in/hg?

Customer: replied 1 year ago.
Not familiar with KPA or HG
Customer: replied 1 year ago.
Is that a setting
Expert:  GM Tech (Cam) replied 1 year ago.

metric vs imperial.

Customer: replied 1 year ago.
in hg
Expert:  GM Tech (Cam) replied 1 year ago.

Ok, now the baro sensor. This needs to be in the data stream somewhere and it should match the map sensor reading with the engine off.

Customer: replied 1 year ago.
I re-checked the data. My scanner is not showing baro
Expert:  GM Tech (Cam) replied 1 year ago.

Ok so that may be limitations on your scanner. THE baro sensor is mounted under the upper rad hose where the metal meets the rubber. Make sure there is no hose on the end of the sensor. It needs to be open to the atmosphere.

Customer: replied 1 year ago.
It's good
Expert:  GM Tech (Cam) replied 1 year ago.

I dont suppose you have access to a different scanner then? There are only so many things we can check without it and we are at the end of the list at the moment.

Customer: replied 1 year ago.
No. I don't.
Customer: replied 1 year ago.
I'm leaving for 3 days early tomorrow. If I get another scanner can we finish next week
Expert:  GM Tech (Cam) replied 1 year ago.

Yes, you can simply reply back when you have the info.

Please bookmark this page so you can easily navigate back to it so we can continue the discussion. This is done by pressing (CTRL D on PC and CMD D on Mac). You can reply at any time for follow up information regarding this issue, even after you rate the site and I will reply.

Customer: replied 1 year ago.
Ok, I did that.
Expert:  GM Tech (Cam) replied 1 year ago.

Ok, Just reply back when you get that scanner and can work through that sheet. If you reply back, I am forced to respond to you so please only reply when you are looking for a response in the mean time.

Expert:  GM Tech (Cam) replied 1 year ago.

And have a good trip where ever you are going.

Customer: replied 1 year ago.
Got it, thanks
Expert:  GM Tech (Cam) replied 1 year ago.

Perfect.