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Gareth

AUC Fault and HVAC Issues After Sensor Replacement

Hello everyone, I recently replaced the sensor in my BMW 3 Series, and now I'm facing some issues. The scan shows an AUC fault, and the heaters are not getting hot. Additionally, I'm experiencing insufficient cooling and heating. Has anyone encountered similar problems or have any advice on how to resolve these issues? Any insights would be greatly appreciated. Thank you!

Summary of the thread

After replacing a sensor in a BMW 3 Series, an AUC fault appeared, and the vehicle's heating and cooling systems are not functioning properly. The core problem may be related to the coolant level or air pockets in the system, which can affect heating performance. Checking and correcting the coolant level and ensuring there are no air pockets are suggested solutions to resolve these HVAC issues.

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2 comment(s)

Gareth (community.author)

Having issues with the heaters not getting hot scanned vehicle had fault with auc sensor i have changed this but fault still there

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BMW

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3