Problem with black smoke and loss of power in BMW X1 successfully resolved with lambda sensor repair

Hello, I have changed the lambda sensor on the x3 f25, how can I reset the engine adaptations, or simply delete the error with the carly? Best regards Jakob

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Hello, I have changed the lambda sensor on the x3 f25, how can I reset the engine adaptations, or simply delete the error with the carly? Best regards Jakob

(Translated from German)

First try to warm up the vehicle to operating temperature, then stop somewhere safely with your car and then simply diagnose again with your universal adapter for OBD2 until it recognizes the lambda error again, then complete the diagnosis and delete the error. There is a message "If your vehicle has the same error again after 3 days, then check something like that and then delete it first, because if you don't have a program like the TÜV, then you have to teach the lambda after the exchange, which can also be done by deleting the error or driving a few kilometers. Or have the error deleted at the TÜV, but your lambda sensor must recognize your vehicle, otherwise it will always report the same thing when starting. Lambda is heating, so that your car reaches operating temperature quickly and the oil is distributed faster. In most cases, if you have a lambda error, the operating temperature is deactivated, although Check in Auto is still displayed. This is important in winter or when it is cold outside in the morning. Without lambda your car needs a little longer, so it jerks when starting or after a few meters it is automatically deactivated, because your car gets warm even without lambda. Diesel does not have a lambda sensor, so it takes longer to start. The quality of the exhaust is also important, only warm air should come out without black smoke. Or the catalytic converter is dirty if the fault cannot be cleared. I have a VW Polo 5G 6N/6N2 Mark 3-5 where the lambda is very important. If it complains, there is no power. Limited to 80 KmH, because it works a lot with air. I have serviced the exhaust gases, but the catalytic converter still complains where the lambda is. The job is done with a cloth. Just not with brake cleaner (Attention) NEVER with brake cleaner. Brake cleaner is not for brakes anywhere else! Drive carefully people there are other road users.

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Hello Jakob, After replacing the lambda sensor, you can use the Carly app to reset the engine adaptations. Simply connect the Carly adapter to your vehicle, open the app, and navigate to the "Service Reset" function. Follow the prompts to reset the engine adaptations. After this, you can use the "Clear Error Codes" function to delete any remaining error codes related to the lambda sensor. If the error code reappears, it may indicate that there is still an issue with the lambda sensor or its circuit.

Thanks, I'll give it a try...

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Hello I have a 2017 series 2 18 diesel grand tourer and I have a lambda sensor failure that appears. The car doesn't have a power fault, nothing at all, but the fault keeps coming back. If you can tell me more! I look forward to hearing from you.

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Hello, you should first check whether the wiring harness of the lambda sensor is in order or whether there is a defect. You should also check whether there is a leak in the exhaust system. Once you have ruled out these faults, I would recommend replacing the lambda sensor.

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What else could be causing the fault? Timing chain is new, solenoid valves are not either

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Hello, If the timing chain and solenoid valves are new and in good condition, other potential causes for the lambda sensor fault could be a faulty mass air flow sensor, a vacuum leak, or a problem with the fuel system such as a failing fuel pressure regulator or dirty fuel injectors. It's also possible that the engine control unit (ECU) itself is malfunctioning. I would recommend having these components checked by a professional mechanic.

Hello, what exactly are the faults with your vehicle?

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