Noahballu
Air conditioning problem and lambda sensor on VW Golf
(Translated from French)
Summary of the thread
The 2001 VW Golf is experiencing an issue where the air conditioning blows hot air. A diagnostic tool suggested replacing the "oxygen sensor (Lambda) bank 1 sensor 2 heating circuit" due to a malfunction. The oxygen sensor helps adjust the air-fuel mixture for optimal engine performance, but its malfunction is unlikely to cause air conditioning problems. For the A/C issue, it is recommended to check the A/C compressor engagement and refrigerant levels.
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VW
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GOLF
CarlyMechanic
The oxygen sensor (Lambda sensor) monitors the level of oxygen in the exhaust gases to help the engine control module adjust the air-fuel mixture for optimal performance and emissions. The "bank 1 sensor 2" refers to the sensor located after the catalytic converter. A malfunction in this sensor's heating circuit can affect fuel efficiency and emissions but is unlikely to directly cause air conditioning issues. For the A/C blowing hot air, check if the A/C compressor is engaging and if the refrigerant level is adequate. Let me know if you need further assistance or if you have any updates.