Philippe67600

Cold start hesitation problems on Audi A5 Diesel

Hello everyone, I own a 2017 Audi A5 2.0L TDI quattro with 190 horsepower and 120,000 km on the odometer. For the past few months, I've been experiencing hesitation during acceleration when the engine is cold. Once the engine reaches its normal temperature, this hesitation disappears. The car is serviced at the dealership, and no warning lights or faults appear during diagnostics. After some research, it seems the problem could be a sensor located in the turbocharger unit. Could you shed some light on this issue? Thank you in advance for your help.

(Translated from French)

The issue involves hesitation during acceleration when the engine is cold in a 2017 Audi A5 2.0L TDI. The problem disappears once the engine warms up, and no diagnostic faults are detected. A potential cause could be a malfunctioning sensor in the turbocharger unit. Suggested solutions include checking and possibly cleaning or replacing the Mass Air Flow (MAF) sensor or the Intake Air Temperature (IAT) sensor, as they are crucial for adjusting the air-fuel mixture during cold starts.

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It's possible that the Mass Air Flow (MAF) sensor or the Intake Air Temperature (IAT) sensor could be causing the hesitation when cold. These sensors play a crucial role in adjusting the air-fuel mixture, especially during cold starts. Try cleaning the MAF sensor with a specialized cleaner, as dirt or debris can affect its performance. If the problem persists, consider having these sensors tested or replaced. Let me know how it goes or if you have any further questions!

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It's possible that the Mass Air Flow (MAF) sensor or the Intake Air Temperature (IAT) sensor could be causing the hesitation when cold. These sensors play a crucial role in adjusting the air-fuel mixture, especially during cold starts. Try cleaning the MAF sensor with a specialized cleaner, as dirt or debris can affect its performance. If the problem persists, consider having these sensors tested or replaced. Let me know how it goes or if you have any further questions!

I was told about a sensor located in the turbocharger unit that needs to be replaced. Is that the one you're referring to? It's from someone who had the same problem as me.

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community_quotation:
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I was told about a sensor located in the turbocharger unit that needs to be replaced. Is that the one you're referring to? It's from someone who had the same problem as me.

The sensor you're referring to might be the Turbocharger Boost Pressure Sensor. This sensor helps manage the turbo boost levels and can affect performance if it's malfunctioning. Before replacing it, check for any loose connections or damaged wiring around the sensor. If everything looks fine, consider having the sensor tested. Let me know if you need further assistance or if you have any updates!

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