NOx Sensor problems

JordanM4 · 10-07-2012, 01:40 PM

Hi everyone,

Just wondering if anyone has ever had their NOx sensor replaced or if anyone knows how to do it themselves? I can see the sensor in the rear of the exhaust but the control unit looks to be under the heat shield? My car is generating these codes in INPA

2AF2 nitric oxide sensor, Lambda Linear
2AF4 NOXsensor, electrical
2AF6 nitric oxide sensor, Lambda binary

and also the sensor voltage after catalyst bank 2 is not always active (which im pretty sure is the NOx sensor)

Any info would be handy. E93 320i

Many thanks

JordanM4 · 10-09-2012, 08:03 AM

I can't see that know one has had any problems with their NOX sensor

naviiiin · 12-19-2012, 03:40 AM

EML came on last week and brought it to the dealer yesterday, it was a problem with the NOX sensor. BMW replaced it but I have no idea what was the trigger.

JordanM4 · 12-19-2012, 07:56 AM

How old is your car and how many miles you done?

10-07-2012, 01:40 PM	#1
JordanM4 Private First Class 16 Rep 126 Posts Drives: BMW M4 Join Date: Aug 2011 Location: Essex iTrader: (0)	NOx Sensor problems Hi everyone, Just wondering if anyone has ever had their NOx sensor replaced or if anyone knows how to do it themselves? I can see the sensor in the rear of the exhaust but the control unit looks to be under the heat shield? My car is generating these codes in INPA 2AF2 nitric oxide sensor, Lambda Linear 2AF4 NOXsensor, electrical 2AF6 nitric oxide sensor, Lambda binary and also the sensor voltage after catalyst bank 2 is not always active (which im pretty sure is the NOx sensor) Any info would be handy. E93 320i Many thanks Last edited by JordanM4; 10-07-2012 at 01:58 PM..
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10-09-2012, 08:03 AM	#2
JordanM4 Private First Class 16 Rep 126 Posts Drives: BMW M4 Join Date: Aug 2011 Location: Essex iTrader: (0)	I can't see that know one has had any problems with their NOX sensor
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12-19-2012, 03:40 AM	#3
naviiiin Registered 0 Rep 1 Posts Drives: BMW E92 320i M Sport Join Date: Dec 2012 Location: South West London / Surrey iTrader: (0)	EML came on last week and brought it to the dealer yesterday, it was a problem with the NOX sensor. BMW replaced it but I have no idea what was the trigger.
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12-19-2012, 07:56 AM	#4
JordanM4 Private First Class 16 Rep 126 Posts Drives: BMW M4 Join Date: Aug 2011 Location: Essex iTrader: (0)	How old is your car and how many miles you done?
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