Notifications
Clear all
0
05/04/2021 8:39 pm
Topic starter
I have a cobalt that I have owned sine late December. It idles rough and idles a little high at startup when its cold. When I put it into reverse or any gear it gets worse. Ive cleaned the MAF sensor and Throttle. I've heard the it could be a coolant temp sensor or MAP sensor. After I get a block down the road its cleared up and drives and shifts perfect. What can I do to find out exactly what's wrong. I have replaced spark plugs. Its got a code P0138 for the downstream o2 sensor according to my Blue Driver but no check engine light.
1 Answer
