CEL Help
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Junior Member
Joined: Jul 2007
Posts: 57
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2002 c230k Coupe
CEL Help
I am getting code P0135 Bank 1 Sensor 1. I was curious if anyone could help me with what in the hell it is? I have eliminated tons of codes by changing out the plugs and maf, etc. If anyone can help me out its appreciated.
Newbie
Joined: May 2008
Posts: 12
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2005 C230K
Ran the code thru my 05 C230k on-line manual and comes up with the O2 sensor and/or the connecting wire. Heater circuit in relationship to the amp the wire is carrying. This is a little technical for me but definitely the place to start.
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From: San Diego, CA & San Jose, Costa Rica & Stuttgart, Germany
1959 220S / 1979 230 G / 2002 A210 AMG / 2003 C320 SC / 2004.5 C320 SS / 2005 ML350 SE / 2008 smart
what YEAR ?
MODEL ?
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MODEL ?
VARIATION ?
and where are you located ?
please update your profile to the left...
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Thread Revival:
Did you get the situation fixed? I am having the same problem. I changed both 02 sensors about 15k miles ago. I have an '03 C230 Sedan (M271). I'm getting the p0135 code, and only that code. This month I changed the spark plugs, coil packs, and MAF sensor. A while back, I installed new Cam Sensors and the plug/wires provided by MB to isolate the oil leak. I have not had any issues with bad mileage etc since then.
Still getting the p0135 code. Car failed inspection today. The car runs fine, has good power, the only performance issue is that I am getting about 5mpg less than normal. I installed Denso direct fit 02 sensors. Could this be a problem? Should I have gotten the factory ones from the MB dealer?
Any help would be appreciated.
Thread Revival:
Did you get the situation fixed? I am having the same problem. I changed both 02 sensors about 15k miles ago. I have an '03 C230 Sedan (M271). I'm getting the p0135 code, and only that code. This month I changed the spark plugs, coil packs, and MAF sensor. A while back, I installed new Cam Sensors and the plug/wires provided by MB to isolate the oil leak. I have not had any issues with bad mileage etc since then.
Still getting the p0135 code. Car failed inspection today. The car runs fine, has good power, the only performance issue is that I am getting about 5mpg less than normal. I installed Denso direct fit 02 sensors. Could this be a problem? Should I have gotten the factory ones from the MB dealer?
Any help would be appreciated.
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Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Please fit genuine Bosch original O2 sensors - NOT universal even if they are Bosch. These cars are very sensitive to O2 sensors & it's obvious that you are running rich.
I can't guarantee that this is the only issue.
I can't guarantee that this is the only issue.
