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But can a exhaust leak be the reason for the cel / errorcode?
I erased the engine light with xentry.
Drove 15mls yet and it didn't came up yet.
Yes the old Sensors are still installed.
Can it be monitored if the engine is running too rich?
Hi mate i have exactly the same problem i was told that its might be the tune so i had it retuned. But its still the same anf for some reason there is accesive steam coming from the exhaust aswell but i am not sure if it has anything to do with fault.
I still got the problem.
Some days ago i changed the camshaft sensors because i had the famous problem with oil in the ecu harness.
So maybe the error won't come again.
My next step would be to Check the exhaust for leaks.
I still got the problem.
Some days ago i changed the camshaft sensors because i had the famous problem with oil in the ecu harness.
So maybe the error won't come again.
My next step would be to Check the exhaust for leaks.
Please let me know if you solve it.
hi @munich55 did you figure out your p2099 code? I just got that one showing pending. Car seems to be driving fine. I’m tuned with intakes only. Did the cam sensors a few months back.
hi @munich55 did you figure out your p2099 code? I just got that one showing pending. Car seems to be driving fine. I’m tuned with intakes only. Did the cam sensors a few months back.
@munich55 hello did you resolve your code with the P2099 Post Catalyst Fuel Trim System Too Rich (Bank 2) and find out what the issue was? I had that code come up again recently for about 2 weeks now and it shows as "Permanent" on my ODB scanner even after clearing it several times. the check engine light stays on but the car seems to drive fine although I dont push it hard at all since the CEL light is on.
Wonder if the issue I have is perhaps related to the air intake sensor connectors since I have an aftermarket air intake system with extensions on the connectors. They are about 3 years old now and not sure if for some reason they go bad.
I just did a full spark plug and coil change at 49k miles (am tuned 93 octane, intakes, nothing else) and the car was running perfect for about 2 months and this P2099 just came up.
To clear permanent codes you need to first fix the problem. Next you need to do a drive cycle with the problem fixed. That pretty much just means drive it for 10 minutes fully warmed up. You will be able to reset the code at that point IF the problem is actually resolved.
Thx I should have specific was asking about that particular code P2099 and for those who had it was it related to the intake sensor or sensor connector starting to fail or something else like the O2 sensor most likely?
I’ve had this come up 2 times prior in the last 3 years and after clearing the code and doing a few drive cycles it went away but not this time so I assume it’s intake related but looking for input from others who’ve experienced the issue.
Thx I should have specific was asking about that particular code P2099 and for those who had it was it related to the intake sensor or sensor connector starting to fail or something else like the O2 sensor most likely?
I’ve had this come up 2 times prior in the last 3 years and after clearing the code and doing a few drive cycles it went away but not this time so I assume it’s intake related but looking for input from others who’ve experienced the issue.
Blackboost USA do have a revision flash that requires you to send in your ecu to them so they can flash it to make this code go away. It's just a intake code the car throws and doesn't effect driveability
Blackboost USA do have a revision flash that requires you to send in your ecu to them so they can flash it to make this code go away. It's just a intake code the car throws and doesn't effect driveability
@Mojo20032004 hey thank you I have BB intakes and will hit up Jose to ask about that. I also heard that the BB intake sensor extension connector might need to be swapped out so I’ll see if I need to get a couple more of those.
will report back once I figure this out appreciate all the help fellas
i had this same issue.couldn’t find much online about resolving this.
having a discussion with the AMG techs here in New Zealand - they advised to do the following:
1. Fill up with the car with the highest octane available at a different gas station. Clear code and if it pops back up proceed to next steps.
2. Remove bank 2: (Drivers side here in New Zealand), Sensor which is located on the CAT itself. Check to ensure this is firstly tight incase it’s exposed to outside air - Remove and clean the sensor. Once replaced, clear code & see if this does the trick. If not, proceed to step 3.
3. Replace Downstream Sensor.
some other things to look out for is during your initial diagnostic, check the voltage of both sensors and check to ensure the voltage is identical. It’s highly unlikely that this issue is due to a faulty sensor - although I have read about people having issues with them. Plug in the scanner and check the fuel rail pressure. Don't start the car but set the car to the second start position. You should see one of the rails losing pressure in the instance that theres a leak.
@munich55 hello did you resolve your code with the P2099 Post Catalyst Fuel Trim System Too Rich (Bank 2) and find out what the issue was? I had that code come up again recently for about 2 weeks now and it shows as "Permanent" on my ODB scanner even after clearing it several times. the check engine light stays on but the car seems to drive fine although I dont push it hard at all since the CEL light is on.
Wonder if the issue I have is perhaps related to the air intake sensor connectors since I have an aftermarket air intake system with extensions on the connectors. They are about 3 years old now and not sure if for some reason they go bad.
I just did a full spark plug and coil change at 49k miles (am tuned 93 octane, intakes, nothing else) and the car was running perfect for about 2 months and this P2099 just came up.
I had a P2097 two yrs ago - changed to Shell 93 - code came back recently then went away - this time threw code: P2099 replaced 3 sensors - bank 2 downstream O2 sensor - Manifold Absolute Pessure sensor and the Intake Air Temperature sensor - threw in two engine air filters and a transmission flush (120,000 miles W212 TT E550 ) I live in Houston metro and just got back from attending funeral services in New Orleans (04/272025) - no cel - original alternator and water pump
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