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post #31 of 43 (permalink) Old 08-06-2015, 01:26 PM
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It isn't your solenoid then. It either was a bad connection at the plug, dirt or corrosion on the connectors or a broken wire.

If it's one of your wires, when you unplugged it and tested it wherever the break is, it connected. Over time as vibration wiggles the break, it will break connection again and the problem will return. If the problem comes back, you're going to have to start checking the wires.


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post #32 of 43 (permalink) Old 08-06-2015, 02:22 PM
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It's hard to tell at this point because everything magically works again. I shook all the wires pretty good and it never lost voltage on either conductor. I'm thinking it's corrosion on the connectors causing the solenoid to act funny. It's possible that inserting/removing the connectors scraped a little bit of corrosion off and lowered the resistance. The di-electric grease may help protect corrosion so we'll see how long this mysterious fix lasts.
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post #33 of 43 (permalink) Old 08-06-2015, 03:25 PM
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Quote:
Originally Posted by LT1Pat View Post
It's hard to tell at this point because everything magically works again. I shook all the wires pretty good and it never lost voltage on either conductor. I'm thinking it's corrosion on the connectors causing the solenoid to act funny. It's possible that inserting/removing the connectors scraped a little bit of corrosion off and lowered the resistance. The di-electric grease may help protect corrosion so we'll see how long this mysterious fix lasts.
Yea, electrical issues like this can sometimes be a real head scratcher. Like you said though, enjoy that the car is running good again and don't worry about it unless it comes back again...at least now you'll have a better idea of where to start looking.


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post #34 of 43 (permalink) Old 08-10-2015, 10:44 AM
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I've put at least 400 miles on the car after I simply unplugged and reconnected the plugs w/dielectric grease and it's bee flawless since. I'm fairly convinced that the root cause is corrosion on the pin/contacts to the solenoid.
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post #35 of 43 (permalink) Old 08-10-2015, 12:08 PM
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Could very well be the case. Glad to hear all is well.


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post #36 of 43 (permalink) Old 09-04-2015, 04:17 PM
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For anyone in the future who has this issue. The part number for the pigtail to replace the connector is: 19119500.

I cut the old connector off and crimped on a new one and everything is back to normal.
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post #37 of 43 (permalink) Old 09-04-2015, 04:57 PM
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Thanks for posting that Naus.


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post #38 of 43 (permalink) Old 10-15-2017, 05:38 PM
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Resurrecting an old thread...

I have the same issue on my Cobalt SS. I haven't gotten the car up on ramps or a jack yet to take a look, but I am almost certain I have the same issue as others since my limp mode comes and goes (I can usually get one or two full boost pulls before I start going into limp mode).

My question is:

Quote:
For anyone in the future who has this issue. The part number for the pigtail to replace the connector is: 19119500.

I cut the old connector off and crimped on a new one and everything is back to normal.
Where can I buy this part # from? A GM parts supplier? Thanks!
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post #39 of 43 (permalink) Old 04-29-2019, 11:27 AM
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So I'm getting the P0243 code and now have no boost. It was intermediate now it is no boost all the time. Where in the world is there anything electrical hooked up to the turbo/wastegate? I see nothing.
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post #40 of 43 (permalink) Old 04-29-2019, 12:01 PM
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Originally Posted by Oodaloop View Post
So I'm getting the P0243 code and now have no boost. It was intermediate now it is no boost all the time. Where in the world is there anything electrical hooked up to the turbo/wastegate? I see nothing.
If you look at your picture you're going to see a vacuum line there on the inlet of the turbo on the right hand side of the picture. Follow that vacuum line. It leads to the wastegate solenoid that we're talking about here.


Here is a picture of the turbo and you can see where that vac line is in your picture here and where it leads to the solenoid. Looks like the plug faces downward.

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Last edited by Robotech; 04-29-2019 at 12:07 PM.
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post #41 of 43 (permalink) Old 04-29-2019, 12:16 PM
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Quote:
Originally Posted by Robotech View Post
If you look at your picture you're going to see a vacuum line there on the inlet of the turbo on the right hand side of the picture. Follow that vacuum line. It leads to the wastegate solenoid that we're talking about here.


Here is a picture of the turbo and you can see where that vac line is in your picture here and where it leads to the solenoid. Looks like the plug faces downward.

Thanks, I didn't think my post actually submitted. But I did find it and while trying to get it off I actually heard/felt it "click" into place. I did a quick test drive around the block and boost is back. I hope that is all it takes but I'll need to do some more testing when I have time.
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post #42 of 43 (permalink) Old 04-29-2019, 02:08 PM
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Originally Posted by Oodaloop View Post
Thanks, I didn't think my post actually submitted. But I did find it and while trying to get it off I actually heard/felt it "click" into place. I did a quick test drive around the block and boost is back. I hope that is all it takes but I'll need to do some more testing when I have time.
If it was loose I can almost promise you that was the issue. Of course, that does beg the question how did it get loose?


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post #43 of 43 (permalink) Old 04-29-2019, 03:00 PM
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If it was loose I can almost promise you that was the issue. Of course, that does beg the question how did it get loose?
The last time it was connected (and that could have been at the assembly plant) the retainer was not latched, and it has taken until now to separate enough to lose contact.

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