Driving to get tuned with CEL?

Jhill

Don’t disconnect the battery while driving just drive it there and don’t go beating on it. It’ll probably throw lean codes but that doesn’t actually mean your lean it’s just means the fuel trim will be out of range. EFI can make massive compensation now days. I’ve had customers VW’s in the past with the breather hose completely cracked open and hanging and yet the PCM was able to compensate and keep the car driving fine, it’s only once you reset the pcm that it will have issues.