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Discussion Starter #1
Hi,

I am wondering if anyone who lives in areas where #1 diesel has the same problem I have.

I bought my 1st Colorado diesel on Oct 25th, 16. The check engine light was on for the test drive but the salesperson said it's an easy fix so we proceeded with the purchase. The service department was closed so I went back the next day to get it cleared. The tech got P2A00 and put the NOx sensor on order. on the 31st, I went in to get the new sensor put in but it didn't fix the code. I left the truck at the dealer for 10 days while I went on a trip.

On Nov 10th, the tech still couldn't figure out what's wrong after they replaced the exhaust as well. I traded that in for another Colorado diesel thinking it was a lemon. However, after a day of driving the 2nd new Colorado it also thrown the P2A00 code. After I talked to a different dealer and GM Customer Service, they said it's the #1 diesel that's causing the problem and no fix is insight.

I'm just wondering if anyone has the same problem I have.
 

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Where about's do you live? Here in Missouri, as well as in Illinois, Indiana and Ohio, I think most all stations sell #2 Diesel. I know in the winter time they run treatment in the fuel to prevent it from gelling but I don't know that they really change the name of it.

Also, other than the light being on, is there any issue with the truck? Or is it just an eyesore. If there was no mechanical issue with it, I don't know that I would worry all that much about it. I did a google search of the difference between #1 and #2 Diesel and I believe is that 1 is for Winter use mainly since it doesn't gel like 2 would. So, actually, I would think that by spring or summer time, they would switch back to 2 and thus your light would go away =)
 

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Where about's do you live? Here in Missouri, as well as in Illinois, Indiana and Ohio, I think most all stations sell #2 Diesel. I know in the winter time they run treatment in the fuel to prevent it from gelling but I don't know that they really change the name of it.

Also, other than the light being on, is there any issue with the truck? Or is it just an eyesore. If there was no mechanical issue with it, I don't know that I would worry all that much about it. I did a google search of the difference between #1 and #2 Diesel and I believe is that 1 is for Winter use mainly since it doesn't gel like 2 would. So, actually, I would think that by spring or summer time, they would switch back to 2 and thus your light would go away =)
I live in Anchorage, Alaska. So far I haven't have any mechanical issue related to the CEL but I do clear the CEL as soon as it comes on. From what I understand at the dealer, if I don't clear the code, the truck will eventually goes into limp mode, but I have not come close to that from my experience.
 

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Gotcha. I could see living in Alaska that the fuel stations might just run #1 diesel year round. And about the light though. I could the newer vehicles doing that if the light stays on long enough. Although, I would think that GM would have thought of that though since stations run #1 or at least a blend of it and #2 in the winter time.
 
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