Where's the AUC sensor in an F30 328i

johnsonlwu · 07-06-2020, 12:12 PM

Got an error saying it's shorted to ground.
Is it closer to intake or somewhere close to cabin filter?
Any help appreciated.

HighlandPete · 07-06-2020, 03:37 PM

Quote:

Originally Posted by johnsonlwu

Got an error saying it's shorted to ground.
Is it closer to intake or somewhere close to cabin filter?
Any help appreciated.

https://www.newtis.info/tisv2/a/en/f...trols/GzpUNuHR

Axis527 · 05-13-2021, 10:50 AM

So I just replaced mine in a 2015 F30 335xi. Since newtis has been shut down I couldn’t find the location anywhere. For anyone that needs to replace the AUC sensor in the F30 chassis, it isn’t in the footwell. You’ll find it in the engine bay, under the passenger side cowl (battery terminal cover) up by the windshield. It twists out like a bulb. Super easy to replace once you actually find it.

cgraner · 03-06-2023, 10:32 PM

804397 AUC-Sensor: Short circuit to ground

https://bmwfault.codes/
Put in 804397 and your engine code

804397 Automatic air recirculation control (AUC) sensor: Short circuit to ground fem_20 Front electronic module

804397 Automatic air recirculation control (AUC) sensor: Short circuit to ground bdc Body Domain Controller

804397 Automatic air recirculation control (AUC) sensor: Short circuit to ground bdc_g11 Body Domain Controller

https://bmwfault.codes/XMLDiagView?d...MAMwA1ADAANAA=

Fault Code Description
This fault code is entered if a short circuit to ground was detected at the automatic air recirculation control sensor.

Fault Code Conditions
General Conditions Supply voltage: 9 V - 16 V
Terminal Condition Terminal 30B on
Driving Conditions

Fault Time Condition
This fault is registered in the fault memory if it is continuously present for a period of at least 2 s.

Service Plan
Check the wiring between the AUC sensor and front electronic module (FEM) for damage and repair, if applicable. If the lines are OK, check the AUC input of the front electronic module (FEM) short circuit to ground. If a short circuit is detected, replace the front electronic module (FEM).If a short circuit is not detected, replace the AUC sensor.

cgraner · 03-06-2023, 10:33 PM

https://www.fcpeuro.com/products/bmw...mw-64119240180

BMW AUC Climate Control Sensor - Genuine BMW 64119240180

Product Information
Controls your BMW HVAC recirculation system by controlling the recirculation flaps

This clever little sensor detects the levels of oxidizable gasses flowing through the engine bay. When a specific threshold is reached, the HVAC recirculation flap closes for a specific time after the noxious gasses are no longer present.

Only for BMW's equipped with Automatic air conditioning (S534A)

07-06-2020, 12:12 PM	#1
johnsonlwu Private 17 Rep 97 Posts Drives: F30328i x 2 (yes, 2) Join Date: Mar 2011 Location: CA iTrader: (0) Garage List 2020 bmw 840i [0.00]	Where's the AUC sensor in an F30 328i Got an error saying it's shorted to ground. Is it closer to intake or somewhere close to cabin filter? Any help appreciated.
	Appreciate 0 Tweet Quote

05-13-2021, 10:50 AM	#3
Axis527 Former WRX Geek 12 Rep 11 Posts Drives: 2014 335xi Sport Line Join Date: Jul 2018 Location: Boston, MA iTrader: (0)	So I just replaced mine in a 2015 F30 335xi. Since newtis has been shut down I couldn’t find the location anywhere. For anyone that needs to replace the AUC sensor in the F30 chassis, it isn’t in the footwell. You’ll find it in the engine bay, under the passenger side cowl (battery terminal cover) up by the windshield. It twists out like a bulb. Super easy to replace once you actually find it.
	Appreciate 0 Quote

03-06-2023, 10:32 PM	#4
cgraner New Member 1 Rep 11 Posts Drives: 2014 BMW 335i, 1998 BMW M3 Join Date: Sep 2020 Location: Toney, AL iTrader: (0)	804397 AUC-Sensor: Short circuit to ground 804397 AUC-Sensor: Short circuit to ground https://bmwfault.codes/ Put in 804397 and your engine code 804397 Automatic air recirculation control (AUC) sensor: Short circuit to ground fem_20 Front electronic module 804397 Automatic air recirculation control (AUC) sensor: Short circuit to ground bdc Body Domain Controller 804397 Automatic air recirculation control (AUC) sensor: Short circuit to ground bdc_g11 Body Domain Controller https://bmwfault.codes/XMLDiagView?d...MAMwA1ADAANAA= Fault Code Description This fault code is entered if a short circuit to ground was detected at the automatic air recirculation control sensor. Fault Code Conditions General Conditions Supply voltage: 9 V - 16 V Terminal Condition Terminal 30B on Driving Conditions Fault Time Condition This fault is registered in the fault memory if it is continuously present for a period of at least 2 s. Service Plan Check the wiring between the AUC sensor and front electronic module (FEM) for damage and repair, if applicable. If the lines are OK, check the AUC input of the front electronic module (FEM) short circuit to ground. If a short circuit is detected, replace the front electronic module (FEM).If a short circuit is not detected, replace the AUC sensor.
	Appreciate 0 Quote

03-06-2023, 10:33 PM	#5
cgraner New Member 1 Rep 11 Posts Drives: 2014 BMW 335i, 1998 BMW M3 Join Date: Sep 2020 Location: Toney, AL iTrader: (0)	https://www.fcpeuro.com/products/bmw...mw-64119240180 BMW AUC Climate Control Sensor - Genuine BMW 64119240180 Product Information Controls your BMW HVAC recirculation system by controlling the recirculation flaps This clever little sensor detects the levels of oxidizable gasses flowing through the engine bay. When a specific threshold is reached, the HVAC recirculation flap closes for a specific time after the noxious gasses are no longer present. Only for BMW's equipped with Automatic air conditioning (S534A)
	Appreciate 0 Quote