Anyone ever heard ofa code 11 on the aldl? Believe it or not, my 92 blazer s-10 tahoe is actually showing this. This problem came about when I was driving on the highway and the check engine light came on. It seems to only come one when I drive it at high speeds or for more than 15 minutes at a time. I think it might be overheating but I don't have anyway to check since the temp gauge does not work. Should I just go ahead and replace the thermostat and hope thats the fix??? Radiator fill seems ok and I don't see any leaks.

 

I'm not showing anything for this code... Are you sure that it is code 11? What are you using to determin the code?

 

I'm shorting the ALDL across terminals A and B. I got code 12 three times as I should and then code 11. Was weird to me too. Idisconnected the negative on the battery and tried the test again and allI get iscode 12.So knowing that my check engine light comes on afterI drive it for long periods, Idrove it around for about a half hour andI now can't seem to make the code11 or any abnormal code come back. Maybe it was a bug in the ECM. Ever hear of anything like this happening?