Frederic Emard

I have a 2020 GMC Sierra 1500 with the 3.0 Duramax and also having the check engine light coming ON and OFF. Appeared first time at about 4500 miles and cleared by itself. Returned again at 5500 miles and cleared by itself again. Brought it to a dealer and they found history DTCS P200A Intake manifold runner control valve performance and P20F8 Intake manifold runner control circuit performance. The codes again reappeared at about 6500 miles and again disapeared by itself. I used my BlueDriver code reader today and it's showing 1 Confirmed Trouble Code : P20F8 (Intake Manifold Runner Control Circuit Performance Bank 1). Somehting's wrong!!