replaced O2 sensors (downstream) codes still showing up
Thread Starter
Newbie
Joined: Oct 2019
Posts: 5
Likes: 0
clk 350 2006
replaced O2 sensors (downstream) codes still showing up
Hi,
I dont know what to do anymore! I need a smog check and I already changed the two O2 sensors on my CLK350 2006. I drove cycles and cycles to get the monitors ready. all of the sudden the P0140 and the P0160 came back on my OBD. I deleted the codes and drove again, thought might just a hick up ... nope ... still coming back on. I dont know where to look anymore. Has someone an idea?
P0160 O2 sensor circuit no activity detected 2 bank sensor 2
P0140 O2 sensor circuit no activity detected Bank 1 sensor 1
Also my OBD is showing me Catalyst Mon = Inc.
Sec. Air system = Inc
I don#t know what to do anymore! someone has an idea?
Thanks in advance!
I dont know what to do anymore! I need a smog check and I already changed the two O2 sensors on my CLK350 2006. I drove cycles and cycles to get the monitors ready. all of the sudden the P0140 and the P0160 came back on my OBD. I deleted the codes and drove again, thought might just a hick up ... nope ... still coming back on. I dont know where to look anymore. Has someone an idea?
P0160 O2 sensor circuit no activity detected 2 bank sensor 2
P0140 O2 sensor circuit no activity detected Bank 1 sensor 1
Also my OBD is showing me Catalyst Mon = Inc.
Sec. Air system = Inc
I don#t know what to do anymore! someone has an idea?
Thanks in advance!
Member
Joined: Mar 2019
Posts: 100
Likes: 15
From: Snohomish Co.
E55 AMG
The odds of both sensors being bad at the same time is a red flag that it is something other than the sensors., Unless you bought some Ebay fakes. Damaged/melted wiring, or leaking exhaust. Make sure the O2 heater fuse is OK. Damaged ECU. Need to have it properly diagnosed with scan data.
Thread Starter
Newbie
Joined: Oct 2019
Posts: 5
Likes: 0
clk 350 2006
Thank you for your post.. mmhhh will check the wires ..
Fuse and relay are good. Tested. I bought them on amazon if I’m honest. I will try to clean the old once. Does someone has experience with cleaning the O2 sensors?
Fuse and relay are good. Tested. I bought them on amazon if I’m honest. I will try to clean the old once. Does someone has experience with cleaning the O2 sensors?
Thread Starter
Newbie
Joined: Oct 2019
Posts: 5
Likes: 0
clk 350 2006
Thread Starter
Newbie
Joined: Oct 2019
Posts: 5
Likes: 0
clk 350 2006
ok I sent them back. bought bosch the same I had before. deleted the codes and know they showing up again.. P0140 and P0160. do I have to drive the cycles first to get rid of them?? do you know that?
Thank you.
Thank you.
Trending Topics
Thread Starter
Newbie
Joined: Oct 2019
Posts: 5
Likes: 0
clk 350 2006
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
The harness that the O2 sensors lug into end up at the ECU. Along the way, they run precariously close to the exhaust pipes and manifold. If a clip breaks, they can contact the hot pipes and melt.
