In this session, we are going to teach downstream O2 sensor delete in BMW SERIE X5 (E53) 4400i V8 286CV E53 with BOSCH ME7.2. ECU
The excellent performance of these captivating cars have attracted the attention of tuners. They have many tuning parts. One of these components that is easy to install and offers high performance is the downpipe, which gives an extra 15hp to the engine.
The installation of aftermarket components, such as downpipe or Decat, or removing the catalytic converter cause the engine check light to turn on. After connecting the diagnostic tool to the vehicle, you will encounter an error code P0420 indicating the wear or damage of the catalytic converter.
That is why you should delete/disable the secondary O2 sensor, as it is responsible for checking the smooth operation of the catalytic converter.
There are many ways to delete or disable the secondary O2 sensor, but the best way is to disable the downstream O2 sensor using the ECU program.
✅To Do This, You Should:
- Read the ECU file.
- Find the desired area in WinOLS and apply the changes based on the training we offer you at CaracalTech.
- Transfer the modified program to the ECU.
BOSCH ME7.2 ME: Motorized Electronic which means this ECU support Electronic throttle 7.2: is a generation and software development for the specific cars.
This ECU is supported with KESS and KTAG.
All right, now let us open the read program in WinOLS.
Press Ctrl + G to find the desired address.
Then, enter 011F9D as the address and change it to 0.
Then, enter 011FA1 as the address and change it to 0.
When these numbers become zero the second O2 sensor has stopped functioning, and the error codes associated with the second sensor are also deleted in the scan tool and will no longer be displayed.
🚨Keep in mind that you do not need to disconnect the second sensor socket.
📍For more information and probable problems feel free to contact us: support@caracaltech.com