The lovely problem has been going on for the last couple days. I get the "stability system disabled" and reduced engine power message which makes the truck ever so fun to drive. The thing is it only happens at start up and only when the truck is warm. If I start the truck cold it is fine but when I shut it off and restart it (like if I go to the store) I will get it. I can cycle the truck on and off and if I get it to start without it throwing the message then the truck drives normally. It is like when the truck cycles through its start up procedures it detects a problem and throws the code. I am also getting a check engine light, I have not checked on it but I do not think they are related and I would bet the CEL is for cats on their way out. The truck is an 03 Yukon Denali XL with 230k on it. I have cleaned the throttle body in the past two years for an unrelated issue.
Any ideas?
Any ideas?
