Thank you for this very helpful post. I am a little confused about bank 1 sensor 1 versus bank 1 sensor 2. I have attached a photo from my C300, from the top. I was wondering if you could help me figure out. The two images on the top are from back of the engine, and the three in the bottom is from the left side of the engine passenger side. I was not sure which one is sensor 1 of the bank 1.  Thank you again.

 

Comments

Profile picture for user MercedesMedic

Sensor 1 is before catalytic converter. Sensor 2 after catalytic converter. 

Bank 2 is driver side cat bank 1 is passenger side cat. 

Cars with only one cat typically on 4 cylinders will only have bank 1.

You can verify by unpluging the suspecting sensor and read the trouble codes with an obd2 scanner. It will give you a code for oxygen sensor bank x sensor x.

Profile picture for user karkh
karkh, 2019-02-25

Thank you for your help. Can you please look at my photo as well. Because my engine is there, so I want to make sure I am replacing the right sensor. The code for me is P0130 which refers to sensor 1 bank 1. The code is already there even without unplugging the socket. My question is from my photo is it the one on the top row of my image or the one one the bottom row of my image. Both are from the passenger side.

Plain text

  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <blockquote cite> <code> <ul type> <ol start type='1 A I'> <li> <dl> <dt> <dd> <h2 id='jump-*'> <h3 id> <h4 id> <h5 id> <h6 id>
  • No HTML tags allowed.
  • Lines and paragraphs break automatically.
  • Only images hosted on this site may be used in <img> tags.
The content of this field is kept private and will not be shown publicly.

2010 Mercedes ML350 BlueTec fuel leak (Left tank)

0
tarheel3759
4 days ago
Mercedes » M-Class » 2006-2011

check liquid level

0
equintquant2
4 days ago
Mercedes » C-Class » 2001-2007

Mercedes Benz clk w208 supercharger

0
timcolledge
6 days 20 hours ago
Mercedes » CLK-Class » 1998-2003

Dodge. Journey 2015

1
TennesseeRebel
1 week ago
Dodge » Journey » 2009-____

Is it my ignition switch?

0
lcserna0423
1 week ago
Dodge » Caravan » 2008-____

2009 Mercedes e350 rwd 80 k miles

2
lucapuca
1 week 2 days ago
Mercedes

2006 chrysler crossfire convertible top problem

2
daisyblemmons
1 week 5 days ago
Chrysler » Crossfire

Problem with automatic start

4
abchris
1 week 5 days ago
Audi » A3 S3 RS3 » 2015-____

Mercedes ML350 bluetec sputter misfire

1
Nmerc
1 week 1 day ago
Mercedes » M-Class » 2012-____

Fuel issue

1
Andrew Williams.90
1 week 2 days ago
Buick » LeSabre » 2000-2005

Brake system

2
tammyduran
1 week 5 days ago
BMW » Z4 » 2003-2008

Best Shocks for Grand Cherokee

2
JohnSmith75
1 week 6 days ago
Jeep » Grand Cherokee

W212 AMG seat swap

1
GPone
1 week 3 days ago
Mercedes

do you need to register new battery on 2006 z4???

1
jdgallo
1 week 3 days ago
BMW » Z4 » 2003-2008

Mercedes CLA 250

4
jc71
1 week 6 days ago
Mercedes

CHANGING DASHBOARD LANGUAGE

2
Master
1 week 4 days ago
Volvo » S40, V40

2004 f150 wont start

1
dldiggs2
2 weeks ago
Ford » F-Series » 2004-2008

2006 chrysler crossfire convertible top problem

1
daisyblemmons
1 week 5 days ago
Chrysler » Crossfire » 2004-2007

Intermittent issue with low cranking power when ESC OFF light comes on

1
SteveJ27
1 week 4 days ago
Hyundai » Elantra » 2007-2010

Apple car play for 2016 e350 4matic

2
Triangle123
1 week 4 days ago
Mercedes » E-Class » 2010-2016

User has not asked any questions.