Join Date: Mar 2011
Location: Montgomery, AL
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I can tell you from personal experience that, at least on an '04 model, if you run it with the icp sensor unplugged, plugging it back in while the engine is running does not cause it to start using data from that sensor again. You must shut it off and restart it, then it'll use sensor data. I know this because I recently fixed a truck with a bad icp sensor. What happened was that unplugging the sensor caused the truck to immediately run right (minus some power, as you described) and watching the sensor values on my scan tool I could see that it started using default values when I unplugged it. Plugging it back in while running did NOT cause the symptoms of the bad sensor to return. As you would expect, it also still showed default values for that sensor. Shutting the truck off and restarting it with the sensor now plugged in DID cause it to go haywire, with the accompanying crazy sensor values.
So, my point in all that rambling is that if you are plugging the sensor back in while it's still running, you are not actually causing the ecm to start using that sensor again-it's still running off the default table until you do a shut off/restart.
Edit: I may have misread your post a couple up from this one to mean that you plugged it back in while it was running. If so, disregard all my drivel.