Help with CEL
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Joined: Jun 2007
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Help with CEL
Hi All
I just purchased a 01 E55. Well I picked it up from Louisville on Saturday drove 315 miles with no check engine light. Went out to dinner that night no problem. Sunday when I was driving the car around town the CEL came on. Stopped by Advanced Auto (which was painful). The guy said bank one and bank two 02 sensor shows lean condition. He also noticed that there was stored codes for the both converters on the same side which according to him his the driver side.
my question is what should I do to fix this issue? My guess is the previous owner knew about CEL (he works for Mercedes) before and cleared it however I would have thought the check engine light would have came on during my 4.5hr drive home from Louisville. I’m new to these vehicles and want to fix the issue the proper way.
I just purchased a 01 E55. Well I picked it up from Louisville on Saturday drove 315 miles with no check engine light. Went out to dinner that night no problem. Sunday when I was driving the car around town the CEL came on. Stopped by Advanced Auto (which was painful). The guy said bank one and bank two 02 sensor shows lean condition. He also noticed that there was stored codes for the both converters on the same side which according to him his the driver side.
my question is what should I do to fix this issue? My guess is the previous owner knew about CEL (he works for Mercedes) before and cleared it however I would have thought the check engine light would have came on during my 4.5hr drive home from Louisville. I’m new to these vehicles and want to fix the issue the proper way.
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Joined: Jan 2014
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From: Republic of Texas
'99 and '05 E55 AMG
Either both O2 sensors are failing or you have a leak in the intake system somewhere. Start checking vacuum lines and look into a smoke test to locate any leaks. Info on the internet on how to perform a smoke test. Also, purchase one of the advanced code readers with the 38-pin adapter so you can use the connector under the hood. Proper diagnostic tools are required for these cars.
Also, the previous owner didn't clear the codes; if he had, there would have been no "stored" codes. Remember, stored means "broke previously but problem went away and is no longer active" (shows as "f" in Xentry) and current means "broke right now" (and displays as "F" in Xentry). Clearing codes completely erases stored and current (although the current codes will immediately reappear until the root problem is corrected).
Also, the previous owner didn't clear the codes; if he had, there would have been no "stored" codes. Remember, stored means "broke previously but problem went away and is no longer active" (shows as "f" in Xentry) and current means "broke right now" (and displays as "F" in Xentry). Clearing codes completely erases stored and current (although the current codes will immediately reappear until the root problem is corrected).
Thread Starter
Junior Member
Joined: Jun 2007
Posts: 38
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Either both O2 sensors are failing or you have a leak in the intake system somewhere. Start checking vacuum lines and look into a smoke test to locate any leaks. Info on the internet on how to perform a smoke test. Also, purchase one of the advanced code readers with the 38-pin adapter so you can use the connector under the hood. Proper diagnostic tools are required for these cars.
Also, the previous owner didn't clear the codes; if he had, there would have been no "stored" codes. Remember, stored means "broke previously but problem went away and is no longer active" (shows as "f" in Xentry) and current means "broke right now" (and displays as "F" in Xentry). Clearing codes completely erases stored and current (although the current codes will immediately reappear until the root problem is corrected).
Also, the previous owner didn't clear the codes; if he had, there would have been no "stored" codes. Remember, stored means "broke previously but problem went away and is no longer active" (shows as "f" in Xentry) and current means "broke right now" (and displays as "F" in Xentry). Clearing codes completely erases stored and current (although the current codes will immediately reappear until the root problem is corrected).
P0410 - Secondary Air Injection system malfunction
P0422 B1 Cat efficiency below threshold
P0432 B2 Cat efficiency below threshold
They said they would need to have the car to diagnose the issue. Any idea where to start? Sounds like its going to be expensive
MBWorld Fanatic!
Joined: Jun 2004
Posts: 3,589
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From: Austin Texas!!!
2001 E55 OMG
I had a shop pull the codes
P0410 - Secondary Air Injection system malfunction
P0422 B1 Cat efficiency below threshold
P0432 B2 Cat efficiency below threshold
They said they would need to have the car to diagnose the issue. Any idea where to start? Sounds like its going to be expensive
P0410 - Secondary Air Injection system malfunction
P0422 B1 Cat efficiency below threshold
P0432 B2 Cat efficiency below threshold
They said they would need to have the car to diagnose the issue. Any idea where to start? Sounds like its going to be expensive
For me, when the temperature falls below 60 the active CEL light goes off. A lot of stop and go causes it to return when cold. Above 60 degrees its automatically on.
In regards to 0410, double check all hose connections in regards to the secondary pump and check valves just to be sure
Im replacing my primary cats mid next week when they come in to see if that solves the problems.
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My car has the same codes right now and just recently acquired the 0410 code. I know for a fact that my primary cat(s) are dead (I deleted the rear cats) which is likely the cause of the 432,422. They are likely clogged and they rattle like an ancient oldsmobile.
For me, when the temperature falls below 60 the active CEL light goes off. A lot of stop and go causes it to return when cold. Above 60 degrees its automatically on.
In regards to 0410, double check all hose connections in regards to the secondary pump and check valves just to be sure
Im replacing my primary cats mid next week when they come in to see if that solves the problems.
For me, when the temperature falls below 60 the active CEL light goes off. A lot of stop and go causes it to return when cold. Above 60 degrees its automatically on.
In regards to 0410, double check all hose connections in regards to the secondary pump and check valves just to be sure
Im replacing my primary cats mid next week when they come in to see if that solves the problems.
did it solve the problem? Where and what kind of cats did you replace the primary with?
