sirswift93

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

MarcusF

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

sirswift93

Bosch direct fit.

cindyclk

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

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.

sirswift93

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

dlbehrns

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.

cindyclk

If not a Bosch MAF...I would swap it out.

sirswift93

It's a Bosch. I just found out that I needed to reset the ECU after installing it. How do I do that?