[mihai_arahidu]

Hello all, i have the following error codes on my X3 F25, thank you for any sugestions! 🙏

287100 - Oxygen sensor before catalytic converter, signal: too high for partial load

290900 - Air mass system: Measured air mass too high

[Opie55]

You can look them up on bmwfault.codes and get some additional information.

[mihai_arahidu]

Originally Posted by Opie55

You can look them up on bmwfault.codes and get some additional information.

Thank you for the advice, this is what I get from bmwfault.codes:

287100

Check exhaust emission system for tightness. If exhaust emission system is leak-free:
1. Check wires and plug connections
2. If wires and plug connections are OK:
Replace oxygen sensor before catalytic converter.

290900

- Check the sensor system for faults. Here, check in particular the charge-air temperature sensor on the display for plausible values. During a certain period, sensors were installed that displayed excessively high temperatures.
- Check the occurrence of the fault with other faults.
If leaks are found in the exhaust emission system, the following service function must be carried out: Delete adaptations, exhaust emission system.
If leaks are found in the air mass system, the following service function must be carried out: Delete adaptations, air mass system.
If the exhaust-gas recirculation valve is being renewed, the following service function must be carried out: Delete adaptations, air mass system.