FritzKoch89

Black smoke and loss of power in the 2018 Audi A1 diesel: Possible defect in the lambda sensor heater?

Good afternoon, everyone! My 2018 Audi A1 Diesel with 26,318 km mileage is really causing problems at the moment. I'm getting black smoke coming out of the exhaust, the check engine light is on, I can feel a loss of power, the engine is running rough, it jerks when accelerating and the fuel consumption is catastrophic! I think the problem could be a defect in the lambda probe heater. Have any of you ever had similar problems with your car? What was your experience with the garage after something similar happened to you? Unfortunately, I had a bad experience last time and am therefore skeptical. Thanks in advance for your help!

(Translated from German)

A 2018 Audi A1 Diesel is experiencing black smoke, loss of power, rough engine performance, and increased fuel consumption, with the check engine light on. The owner suspects a defect in the lambda sensor heater as the cause. Another person shared a similar experience with a different Audi model, where the issue was resolved by repairing the lambda sensor heater, suggesting this as a potential solution to explore before considering more costly repairs like the turbocharger.

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4 comment(s)

Hi, sure, I totally understand what you mean. I had almost the same problem with my 2015 Audi A4 petrol engine. I was initially told it was probably a problem with the turbocharger. My garage then ran numerous tests until they luckily found out that it was just the lambda sensor heater. In any case, keep your fingers crossed that it's not the turbo, otherwise it will be expensive. Good luck!

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Your story kind of reminds me of what's happening to my A1 right now. It's good to know that it might not just be the lambda sensor heater. Do you happen to remember how much the repair cost you?

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Cost: €155 for the repair of the lambda sensor cable. Let us know how it turns out! Good luck!

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Thank you for your helpful answer! 155€ for the repair doesn't sound too bad either. I will definitely mention this to the mechanic and have him check whether the problem with my A1 could also be with the turbocharger or the lambda sensor heater. Thanks again for the tip!

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