ML320 with check engine light & codes P0450 P0446
Thread Starter
Newbie
Joined: Sep 2006
Posts: 4
Likes: 0
ML320 with check engine light & codes P0450 P0446
Hello all. This is my first post and it is in regards to our family's ML320. It currently has a check engine light on and the codes that I read with my scanner were P0446 and P0450.
Now i know what their definition but im not aware as to what the problem might be or were the problem is located.
Any help would be appreciated! Thanks
P.S. The ML has 88,000 miles and a new fuel pump assembley was just installed.
P0446 - Evaporative Emission Control System Vent Control Circuit Malfunction
P0450 - Evaporative Emission Control System Pressure Sensor Malfunction
Now i know what their definition but im not aware as to what the problem might be or were the problem is located.
Any help would be appreciated! Thanks
P.S. The ML has 88,000 miles and a new fuel pump assembley was just installed.
P0446 - Evaporative Emission Control System Vent Control Circuit Malfunction
P0450 - Evaporative Emission Control System Pressure Sensor Malfunction
Newbie
Joined: Feb 2007
Posts: 11
Likes: 0
From: Chicago
99 ML 320 with 81,000 miles
3/19/10:
I have problem fixed after a long time. After changing the MAF multiple times and re-did the intake. But the actual problem was the plastic tube going from MAF to engine. There is a flexible piece which connects MAF to hard plastic tube. In my case the connection was lil loose and it leaked air from there. After changing it all the problems went away.
Naked eye can not catch this problem. you have to know this. Just wiggle this connection and see if parts move left, right it is a problem.
Now you know. Hope it saves you some green.
Pradeep
I have problem fixed after a long time. After changing the MAF multiple times and re-did the intake. But the actual problem was the plastic tube going from MAF to engine. There is a flexible piece which connects MAF to hard plastic tube. In my case the connection was lil loose and it leaked air from there. After changing it all the problems went away.
Naked eye can not catch this problem. you have to know this. Just wiggle this connection and see if parts move left, right it is a problem.
Now you know. Hope it saves you some green.
Pradeep
