secondary air and lean codes keep coming back.
Thread Starter
Junior Member
Joined: Jul 2017
Posts: 21
Likes: 0
GLK 350
secondary air and lean codes keep coming back.
P0410, P0171,P0174
Ive had these codes for months now. I have replaced the MAF sensor, the secondary air pump, all the lines from the air pump to the check valves, and I've replaced both check valves. The codes keep coming back. Ive gotten a vacuum test to test for leaks and no leaks. Has anyone else had the same issue?
Ive had these codes for months now. I have replaced the MAF sensor, the secondary air pump, all the lines from the air pump to the check valves, and I've replaced both check valves. The codes keep coming back. Ive gotten a vacuum test to test for leaks and no leaks. Has anyone else had the same issue?
Newbie
Joined: Jul 2021
Posts: 8
Likes: 0
From: Ontario
2012 GLK350 4MATIC
Hello I am new to this forum, I have been reading through different posts about the secondary air pump and affiliated components. Did you solve your issue? What was the solution?
I am looking at having work done to my 2012 glk because my secondary air pump is really loud and clearly on its way out. I am also looking at replacing the check valves and relay, but wonder if I should be replacing the change-over valve for the air injection system?
Thanks.
I am looking at having work done to my 2012 glk because my secondary air pump is really loud and clearly on its way out. I am also looking at replacing the check valves and relay, but wonder if I should be replacing the change-over valve for the air injection system?
Thanks.
