CEL code interpretations….
Thread Starter
Senior Member
Joined: Oct 2010
Posts: 340
Likes: 8
mercedes 71 280sl. Porsche 930 . Ducati mh900 and ps1000
CEL code interpretations….
Hi guys
got a few codes
1- misfire on 5-6-7-8
2-sec air valve stuck open bank 1
3-MAF back one
car runs fine
how does the computer know what air valve is stuck if they both controlled by the same vacuum ?
thanks
got a few codes
1- misfire on 5-6-7-8
2-sec air valve stuck open bank 1
3-MAF back one
car runs fine
how does the computer know what air valve is stuck if they both controlled by the same vacuum ?
thanks
Super Member
Joined: Dec 2009
Posts: 748
Likes: 93
From: Dhahran, KSA
2020 E 300 Coupe and 2019 GLS 400
Hello,
I believe through the o2 sensors and the periodic testing function of the SAI pump. The pump runs for a few seconds during operating temperature and the feedback from the o2 sensors is used to diagnose if a valve is stuck.
I believe through the o2 sensors and the periodic testing function of the SAI pump. The pump runs for a few seconds during operating temperature and the feedback from the o2 sensors is used to diagnose if a valve is stuck.
