[socool88]

Hi...so just to be clear I am running catless DPs, have been for the last 4 some odd years, while using mhd so I've never gotten an SES light from not having cats.

Recently however, I've been getting ses lights, and bad car performance, under daily driving. Havent drove my car very fast in a long time due to issues, but mainly I get poor acceleration between 40-55mph and rough idle.

Took it to my indy shop where the mechanic replaced an Upstream o2 sensor on bank 2. Sadly, this did not alleviate my issue as these codes keep coming up. I've attached a picture of my codes through MHD.

I made a log of my AFR for b1 and b2 but I can't seem to upload csv files here so im not sure how I can show you that. Should I just replace all 4 oxygen sensors at this point? Thanks for any help.

[Bradn54]

Try resetting o2 sensor adaptions using mhd, it should be done after a new o2 sensor is fitted,you will have to go for a drive n they will recalibrate!
you’ve got a few codes going on with your car, clear them and see what comes back! If you upload your csv file to datazap then copy and paste that log into this we will be able to see it, that’s what I do anyways!

[Saif2018]

Originally Posted by socool88

Hi...so just to be clear I am running catless DPs, have been for the last 4 some odd years, while using mhd so I've never gotten an SES light from not having cats.

Recently however, I've been getting ses lights, and bad car performance, under daily driving. Havent drove my car very fast in a long time due to issues, but mainly I get poor acceleration between 40-55mph and rough idle.

Took it to my indy shop where the mechanic replaced an Upstream o2 sensor on bank 2. Sadly, this did not alleviate my issue as these codes keep coming up. I've attached a picture of my codes through MHD.

I made a log of my AFR for b1 and b2 but I can't seem to upload csv files here so im not sure how I can show you that. Should I just replace all 4 oxygen sensors at this point? Thanks for any help.

You can upload it to datazap.me for free. You should be able to slide to the left from "graph a log" under the monitor tab and select datazap.me directly. If that doesn't work, goto datazap.me and find and upload manually the .csv file under MHD Dataloging folder.

[socool88]

Originally Posted by Bradn54

Try resetting o2 sensor adaptions using mhd, it should be done after a new o2 sensor is fitted,you will have to go for a drive n they will recalibrate!
you’ve got a few codes going on with your car, clear them and see what comes back! If you upload your csv file to datazap then copy and paste that log into this we will be able to see it, that’s what I do anyways!

I have tried this, I assume it’s the lamba sensors and lamba regulation options?

[Saif2018]

Originally Posted by socool88

I have tried this, I assume it’s the lamba sensors and lamba regulation options?

Yes. If your throttle is fluctuating, reset the throttle turn ignition on only (don't start the car yet) wait 30 seconds with ignition on only, then start the car.

[Bradn54]

Originally Posted by socool88

I have tried this, I assume it’s the lamba sensors and lamba regulation options?

Yep that’s it, I would do a log and see what your fuel pressures are as your getting fuel pressure faults, need you to upload a log really so we can have a look at what is going on 😁

[socool88]

Okay so I reset the throttle adaptation, now the only codes I’m getting are 2aaf and 2c6c o2 sensor 2 after cat converter and 2c7f

How do I know which bank that o2 sensor is?

[Saif2018]

Originally Posted by socool88

Okay so I reset the throttle adaptation, now the only codes I’m getting are 2aaf and 2c6c o2 sensor 2 after cat converter and 2c7f

How do I know which bank that o2 sensor is?

Pre cat and post cat bank 2 according to your codes.