P2626 Error Code
Thread Starter
Newbie
Joined: Mar 2014
Posts: 3
Likes: 0
2008 Mercedes c230
P2626 Error Code
Hi Everyone,
I have a 2008 C230 and I got this error recently. I don't notice any loss in power or engine issues with the CEL on. It went away on it's own after 3 days being one, was off for two and now it's back on.
Any ideas what I can check?
Thanks@
I have a 2008 C230 and I got this error recently. I don't notice any loss in power or engine issues with the CEL on. It went away on it's own after 3 days being one, was off for two and now it's back on.
Any ideas what I can check?
Thanks@
Super Member
Joined: Dec 2013
Posts: 879
Likes: 10
From: Tampa, Florida
2011 C300 4Matic Sport
P2626 Error Code is related to the O2 sensor in the exhaust. This sensor may be faulty, may have an issue with the catalytic converter emissions, or have a "clogged" catalytic converter due to high RPMs from high speeds causing soot to build up.
A C230 is a European model w204, I am guessing you have been having too much fun on the autobahn? (assuming you are from Germany)
A C230 is a European model w204, I am guessing you have been having too much fun on the autobahn? (assuming you are from Germany)
Newbie
Joined: Sep 2018
Posts: 5
Likes: 2
ML B and C
Hi all,
I had this issue on my W246 (M270 engine) throwing up the P2626 error every few days and here is the solution that worked for me. Just signing up and posting to P2626 questions in the hope of being able to help others, as I know it could be frustrating. I have spent hours trying things and monitoring...
what worked for my case: cleaned the oxygen sensor CONNECTOR
- I simply unplugged it
- sprayed some contact cleaner on both connectors (I used a product similar to WD40, not really contact cleaner but it worked)
- wiped any excess with tissue
- plugged and unplugged a few times
- kept it secure in the clip (to prevent it from being loose due to vibration)
P2626 never happened again so far - 1month and counting
other things I have suspected (in hindsight, I believe none of these are the root cause)
a. only using premium fuel - always 98 instead of just 95 or using different brands
b. changing air filter - MAY HAVE HELPED - the day I changed this, I still got the P2626 - so in my case this was not the issue, but I'd recommend this be changed too - I can see the air/fuel ratio is much better after changing this
c. software update - MAY HAVE HELPED - I note that after this s/w update (done by a dealer), the CEL came on again after 1 day - so I thought this was not really the root cause, but it may have helped.
Hope this helps anyone having the P2626 issue on their mercedes.
note: The above is what worked for my case, it may or may not work for everyone.
Good luck all.
I had this issue on my W246 (M270 engine) throwing up the P2626 error every few days and here is the solution that worked for me. Just signing up and posting to P2626 questions in the hope of being able to help others, as I know it could be frustrating. I have spent hours trying things and monitoring...
what worked for my case: cleaned the oxygen sensor CONNECTOR
- I simply unplugged it
- sprayed some contact cleaner on both connectors (I used a product similar to WD40, not really contact cleaner but it worked)
- wiped any excess with tissue
- plugged and unplugged a few times
- kept it secure in the clip (to prevent it from being loose due to vibration)
P2626 never happened again so far - 1month and counting
other things I have suspected (in hindsight, I believe none of these are the root cause)
a. only using premium fuel - always 98 instead of just 95 or using different brands
b. changing air filter - MAY HAVE HELPED - the day I changed this, I still got the P2626 - so in my case this was not the issue, but I'd recommend this be changed too - I can see the air/fuel ratio is much better after changing this
c. software update - MAY HAVE HELPED - I note that after this s/w update (done by a dealer), the CEL came on again after 1 day - so I thought this was not really the root cause, but it may have helped.
Hope this helps anyone having the P2626 issue on their mercedes.
note: The above is what worked for my case, it may or may not work for everyone.
Good luck all.
