Error code P2195
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Joined: May 2014
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C63
Error code P2195
Background: I have a 2010 C63 AMG. 45k miles. It has full exhaust, headers, cold air intake, and ECM tune. I've had it for 3 years with virtually zero problems. For the past week, the car has been a little rough at idle. Around 500-600 rpm and almost seems like it's going to stall out. The car shakes a little bit at idle. After having a rough idle for about a week, yesterday it finally popped up an error code. I had it checked out today and it's P2195.
I did a search and couldn't find anyone who has had this code before. It's sort of a generic catch-all code regarding air/fuel that could mean any number of problems. The exact error it describes is: O2 A/F Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 1). So it's an issue with the O2 sensor reading lean. I'm pretty certain bank 1 sensor 1 is on the passenger side.
My gut instinct is to say that I got a bad tank of gas which has clogged up one of my fuel injectors (or something else in the fuel path) and that it should go away with (a) a new tank of gas and (b) some fuel injector cleaner. But, from what I've researched, it could be more serious than that. It could be a bad fuel injector, a fuel pressure regulator, a MAF, an O2 sensor, a bad vacuum line somewhere, etc.
Anyone had this code before or otherwise have recommendations on where to begin? I don't want to just start replacing parts one-by-one and wasting money, I'd prefer to pinpoint the problem first. Thanks.
I did a search and couldn't find anyone who has had this code before. It's sort of a generic catch-all code regarding air/fuel that could mean any number of problems. The exact error it describes is: O2 A/F Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 1). So it's an issue with the O2 sensor reading lean. I'm pretty certain bank 1 sensor 1 is on the passenger side.
My gut instinct is to say that I got a bad tank of gas which has clogged up one of my fuel injectors (or something else in the fuel path) and that it should go away with (a) a new tank of gas and (b) some fuel injector cleaner. But, from what I've researched, it could be more serious than that. It could be a bad fuel injector, a fuel pressure regulator, a MAF, an O2 sensor, a bad vacuum line somewhere, etc.
Anyone had this code before or otherwise have recommendations on where to begin? I don't want to just start replacing parts one-by-one and wasting money, I'd prefer to pinpoint the problem first. Thanks.
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From: Los Angeles
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
I'd just go ahead and replace the primary O2s out of maintenance if you haven't done it for a couple of years. With headers and full exhaust, it's not uncommon for their lifetimes to be reduced. Mine failed immediately after doing the headers, and I'm about to replace them again now just about 2yrs later. I bet that fixes it.
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Joined: Oct 2016
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From: Tampa, FL
2010 C63 AMG- Black; 1990 Nissan 240sx hatchback (SR20)- Mint Green
Just had this exact issue for a few weeks, code was on car when i purchased it. Wasn't O2 sensor related at all. It can be caused by vacuum leaks, and that seems to be the most common cause from the reading I did. Tried a few things and checked for vacuum leaks, possibly MAF reading incorrectly. Ended up being a small exhaust leak from header to exhaust right in front of o2 sensor, so extra air was coming in through leak and engine thought car was running lean. Snuggled the bolts up, cleared it, and it's been perfect since. I would check vacuum and exhaust leaks before you start replacing sensors, those are most common reasons for throwing that code.
Last edited by stewfortysx; Nov 10, 2016 at 04:30 PM.
Thread Starter
Member
Joined: May 2014
Posts: 104
Likes: 2
C63
Just had this exact issue for a few weeks, code was on car when i purchased it. Wasn't O2 sensor related at all. It can be caused by vacuum leaks, and that seems to be the most common cause from the reading I did. Tried a few things and checked for vacuum leaks, possibly MAF reading incorrectly. Ended up being a small exhaust leak from header to exhaust right in front of o2 sensor, so extra air was coming in through leak and engine thought car was running lean. Snuggled the bolts up, cleared it, and it's been perfect since. I would check vacuum and exhaust leaks before you start replacing sensors, those are most common reasons for throwing that code.
I'll definitely look for leaks under the hood first to see if that's the problem.
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From: dfw
'10 C63
here is a link to my thread. although it's a different code number, i think it just refers to a different sensor
https://mbworld.org/forums/c63-amg-w...o2-sensor.html
https://mbworld.org/forums/c63-amg-w...o2-sensor.html
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2005 E55
here is a link to my thread. although it's a different code number, i think it just refers to a different sensor
https://mbworld.org/forums/c63-amg-w...o2-sensor.html
https://mbworld.org/forums/c63-amg-w...o2-sensor.html
