P2099 Service Engine Code
Thread Starter
Senior Member
Joined: Dec 2007
Posts: 268
Likes: 3
From: Jersey
2023 GLC 300 SUV, 2006 BMW Z4M Roadster, 2006 Lexus RX400h
P2099 Service Engine Code
Hi everyone,
The service engine light recently came on with my C450. I plugged in an OBD2 scanner and it came up with this code:
P2099
Post Catalyst Fuel Trim
System Too Rich Bank 2
Has anyone had this happen and should I be concerned? I reset it and it hasn't come back yet so will see what happens.
Thanks in advance!
The service engine light recently came on with my C450. I plugged in an OBD2 scanner and it came up with this code:
P2099
Post Catalyst Fuel Trim
System Too Rich Bank 2
Has anyone had this happen and should I be concerned? I reset it and it hasn't come back yet so will see what happens.
Thanks in advance!
Thread Starter
Senior Member
Joined: Dec 2007
Posts: 268
Likes: 3
From: Jersey
2023 GLC 300 SUV, 2006 BMW Z4M Roadster, 2006 Lexus RX400h
Update: the service light was still randomly coming on and going off occasionally so finally brought it into the dealer and they told me they reflashed a module. Will see if it comes back. Hopefully not!
Thread Starter
Senior Member
Joined: Dec 2007
Posts: 268
Likes: 3
From: Jersey
2023 GLC 300 SUV, 2006 BMW Z4M Roadster, 2006 Lexus RX400h
Well a year later and another deal visit and still having this problem, they keep blaming winter fuel mixture.
Any suggestions on what I should do next? Insist that they replace the sensors?
Any suggestions on what I should do next? Insist that they replace the sensors?
Newbie
Joined: May 2021
Posts: 4
Likes: 0
2018 c43 amg
I have a 2018 c43 with stage 2 AMR tune. I keep throwing this code. No signs of exhaust leak. I changed both the pre and post cat (downpipe) sensor and the exhaust gasket. Next thing is to swap out the air filters with OEM ones and clean the MAF sensor. Have you had this code thrown all because of dirty filters?
