Oxygen Sensor Light still on after replacement

Dec 30, 2011 | 10:10 PM

sirswift93

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Joined: Jul 2007

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CLK320 Cabrio 2001

Oxygen Sensor Light still on after replacement

I changed Bank 1, Sensor 1 and Sensor 2 after getting a replacement request via check engine to replace Sensor 1. After doing so, the light came back on saying to replace Sensor 1.

After clearing it for a few days it had finally stayed off for over three weeks and then it came back on again with the addition of:

P0150
Oxygen Sensor
Circuit Bank 2
Sensor 1

P0136
Oxygen Sensor
Circuit Bank 1
Sensor 2 (See P2270, P2271)
I looked up these two codes an they are O2 Sensor Signal Stuck Lean and O2 Sensor Signal Stuck Rich, respectively)

P0141
Oxygen Sensor Heater
Circuit Bank 1
Sensor 2
(My OTC 3111 Scanner states that a frequent fix for this is Repair Connector B2.)

Any help would be appreciated

Swift

Dec 30, 2011 | 11:47 PM

MarcusF

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From: SCV SoCal

2002 CLK430

What brand of O2 sensor and was it a direct fit, universal, or Mercedes-Benz OE?

Dec 31, 2011 | 12:26 AM

sirswift93

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CLK320 Cabrio 2001

Quote:

Originally Posted by MarcusF

What brand of O2 sensor and was it a direct fit, universal, or Mercedes-Benz OE?

Bosch direct fit.

Jan 2, 2012 | 08:01 AM

cindyclk

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From: North of Boston

https://mbworld.org/forums/clk-class...ht-clk430.html

Jan 2, 2012 | 12:20 PM

dlbehrns

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From: Nebraska

99CLK320,

I had the same issue with one of the primary sensors you mentioned which I replaced and the error code keep coming back even after I deleted it. I changed the MAF and the error code was solved.

Jan 2, 2012 | 01:32 PM

sirswift93

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CLK320 Cabrio 2001

Quote:

Originally Posted by dlbehrns

I had the same issue with one of the primary sensors you mentioned which I replaced and the error code keep coming back even after I deleted it. I changed the MAF and the error code was solved.

I changed the MAF about two months ago; now wondering if i purchased a defective MAF.

Jan 2, 2012 | 05:48 PM

dlbehrns

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From: Nebraska

99CLK320,

You can get the MAF element insert by Bosch from autohausaz.com. I have never found it on their website so you have to call and ask for it. Do you have the 1/4" drive torques with the hole in the center of the socket? that's what you need remove the insert.