O2 sensors help W208
Thread Starter
MBWorld Fanatic!
Joined: May 2006
Posts: 1,486
Likes: 4
From: San Antonio, Tx
2000 CLK430
O2 sensors help W208
I have the whole story posted here:
https://mbworld.org/forums/clk-class-w208/234619-oxygen-sensor-question.html
Ok I got my codes pulled and here they are:
PO100: MAF or MAP sensor condition
P0130: HO2S 11 circuit condition (Heated Oxygen sensor Bank 1 Sensor 1)
P0150: HO2S-21 circuit condition (Heated Oxygen sensor Bank 2 Sensor 1)
P0170: Fuel Trim Bank 1
P0173: Fuel Trim Bank 2 condition
I have already replaced the MAF a month as stated earlier BUT with one that I bought off of Ebay for 120 bucks. Could it actually be the MAF again since it is affecting both Banks??? I am at a loss on what to do...NEW MAF or 2 new O2 sensors??
https://mbworld.org/forums/clk-class-w208/234619-oxygen-sensor-question.html
Ok I got my codes pulled and here they are:
PO100: MAF or MAP sensor condition
P0130: HO2S 11 circuit condition (Heated Oxygen sensor Bank 1 Sensor 1)
P0150: HO2S-21 circuit condition (Heated Oxygen sensor Bank 2 Sensor 1)
P0170: Fuel Trim Bank 1
P0173: Fuel Trim Bank 2 condition
I have already replaced the MAF a month as stated earlier BUT with one that I bought off of Ebay for 120 bucks. Could it actually be the MAF again since it is affecting both Banks??? I am at a loss on what to do...NEW MAF or 2 new O2 sensors??
Member
Joined: Jun 2006
Posts: 87
Likes: 0
From: USA
ML500 AMG pkg
Usally a PO170 is a air mass sensor but the O2 codes are usually not present. Look at the O2 connector and check for corrosion, sometimes the drain in the cowling gets clogged and water fills and over flows into the vehicle soaking carpet and corroding O2 wires. Hope this helps.
Senior Member
Joined: Aug 2004
Posts: 263
Likes: 11
BMW E30. I've turned to the dark side.
"BUT with one that I bought off of Ebay for 120 bucks. " You have answered your own question. beg, borrow or steal a 'known good' maf off of any of your friend's 113 V8 benz engine and plug it in. just my $.02
edit: BTW those o2 codes are usually a result of when a lean mixture causes low voltage on the o2 sensors' signal wires. ME sees that as a bad sensor. MAF
edit: BTW those o2 codes are usually a result of when a lean mixture causes low voltage on the o2 sensors' signal wires. ME sees that as a bad sensor. MAF
Last edited by benz-tech; Mar 25, 2008 at 03:57 PM.
Thread Starter
MBWorld Fanatic!
Joined: May 2006
Posts: 1,486
Likes: 4
From: San Antonio, Tx
2000 CLK430
I am now replacing my catalytic converter, the primaries are making a heck of alot more noise. And I think that they might be really plugged causing my bad hesitation. I think that my bad cats are causing my CEL light and those errors?? Am I right? Either way I hate the noise so I am going to replace on Moday with some cats from a CL55. The shop said the job would cost 600 to get these new ones welded in.
The only question I have with this is that I am wondering if I should just buy some higher flowing cats like "Metal Cat" instead of using the CL55's cats?
Am I going the wrong way about this whole problem? My CEL light has been going on and off every day and I just want this thing back to normal (or better) if possible.
Thanks for the help so far!!
Greg
The only question I have with this is that I am wondering if I should just buy some higher flowing cats like "Metal Cat" instead of using the CL55's cats?
Am I going the wrong way about this whole problem? My CEL light has been going on and off every day and I just want this thing back to normal (or better) if possible.
Thanks for the help so far!!
Greg
