Continuing CEL P1128 story

[trauh]

I've been tracking down an elusive P1128 Check Engine code for a few months. It comes on occasionally, and indicates that cylinders 1-3 are too lean and the DME cannot adjust for it. We've checked more items that I can list, but yesterday we found a small intake leak on the throttle body (mechanic found it by spraying carburetor cleaner on the body!). The odd part is that the leak was on the opposite set of cylinders than where I get the CEL.

Hopefully this was the underlying problem. If not then I have no choice but to try the dealer over the winter...

[trauh]

Just came back from a trip and I put 400 miles on the car. No check engine light, so I am hopeful we found the issue. For those who have get an P1128 (or the equivalent for the other cylinders), this might give one more item to investigate as a root cause.

[ar38070]

I am looking at this too. Do you have a picture of where the leak was?

[trauh]

Sorry, no photos as the work was done by a local mechanic. He used carburetor cleaner to locate the leak and then verify that it was fixed - maybe that will work for you.

Also, I assume that you searched the site for whatever code you are getting, as there is a wealth of info. Good luck.

Just came back from a trip and I put 400 miles on the car.  No check engine light, so I am hopeful we found the issue.  For those who have get an P1128 (or the equivalent for the other cylinders), this might give one more item to investigate as a root cause.

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