P0446 has me stumped
Thread Starter
MBWorld Fanatic!
Joined: Feb 2011
Posts: 2,562
Likes: 197
From: Austin, TX
2006 E55, 2012 GLK350 & 1992 190e sportline
P0446 has me stumped
Hey all, throwing a p0446. I took it in to an indy who suggested I replace the evap switch under the hood, gas cap and valve cover gaskets. I did all that and got the code again. I took it to MB of Austin and they said it was the charcoal canister, shut off valve and MAF I replaced all of those too and still get the code. They were all replaced with oe mb parts. What is there left to do? Oh. I replaced the harness at the shut off valve also.
MBWorld Fanatic!
Joined: Oct 2012
Posts: 1,427
Likes: 100
From: Florida
2002 CLK 55 AMG cabriolet Eurocharged
Sounds like all bases covered for this code except crankcase breather pipes or a loose pipe on the MAF.
I think the shops would have found this.
Wire problem likely or coding malfunction in tune. hmmm!
If star is available you could get deeper with diagnostics in EPC.
Any fuel tank service in the past?
Gator
I think the shops would have found this.
Wire problem likely or coding malfunction in tune. hmmm!
If star is available you could get deeper with diagnostics in EPC.
Any fuel tank service in the past?
Gator
Thread Starter
MBWorld Fanatic!
Joined: Feb 2011
Posts: 2,562
Likes: 197
From: Austin, TX
2006 E55, 2012 GLK350 & 1992 190e sportline
Sounds like all bases covered for this code except crankcase breather pipes or a loose pipe on the MAF.
I think the shops would have found this.
Wire problem likely or coding malfunction in tune. hmmm!
If star is available you could get deeper with diagnostics in EPC.
Any fuel tank service in the past?
Gator
I think the shops would have found this.
Wire problem likely or coding malfunction in tune. hmmm!
If star is available you could get deeper with diagnostics in EPC.
Any fuel tank service in the past?
Gator
they had the car for 5 days. I did replace the fuel sending unit when I got the car because it was leaking.
MBWorld Fanatic!
Joined: Aug 2006
Posts: 7,053
Likes: 398
From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
Waaa, sorry to hear you spend that much $$$$ & time with NO results, especially when dealer pretend they save your auto world..
,
i think your issue related to "purge valve/charcoal filter/air pressure in tank"..!,,
did you check any of these..??
-;ZAYED;-
,i think your issue related to "purge valve/charcoal filter/air pressure in tank"..!,,
did you check any of these..??
-;ZAYED;-
Thread Starter
MBWorld Fanatic!
Joined: Feb 2011
Posts: 2,562
Likes: 197
From: Austin, TX
2006 E55, 2012 GLK350 & 1992 190e sportline
also the valve cover gaskets, breather hoses, maf and maf gasket have been replaced.
MBWorld Fanatic!
Joined: Aug 2006
Posts: 7,053
Likes: 398
From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
Air should not been build in fuel tank, it's must be sucked & burned through the intake,
if all these you already replaced, with hoses, then check the EGR & EGR hoses,
if they're also good, then you will have check the harness well, maybe some of wires insulation went bad, or some of connectors not set properlly,,
need to be little bit patience with these kind of damn puzzles..
-;ZAYED;-
if all these you already replaced, with hoses, then check the EGR & EGR hoses,
if they're also good, then you will have check the harness well, maybe some of wires insulation went bad, or some of connectors not set properlly,,
need to be little bit patience with these kind of damn puzzles..
-;ZAYED;-
Trending Topics
Thread Starter
MBWorld Fanatic!
Joined: Feb 2011
Posts: 2,562
Likes: 197
From: Austin, TX
2006 E55, 2012 GLK350 & 1992 190e sportline
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
Thread Starter
MBWorld Fanatic!
Joined: Feb 2011
Posts: 2,562
Likes: 197
From: Austin, TX
2006 E55, 2012 GLK350 & 1992 190e sportline
Air should not been build in fuel tank, it's must be sucked & burned through the intake,
if all these you already replaced, with hoses, then check the EGR & EGR hoses,
if they're also good, then you will have check the harness well, maybe some of wires insulation went bad, or some of connectors not set properlly,,
need to be little bit patience with these kind of damn puzzles..
-;ZAYED;-
if all these you already replaced, with hoses, then check the EGR & EGR hoses,
if they're also good, then you will have check the harness well, maybe some of wires insulation went bad, or some of connectors not set properlly,,
need to be little bit patience with these kind of damn puzzles..
-;ZAYED;-
this has been going on so long my 190e is on it's way out from ca so I have something to drive.
