Check engine light

JordanM4 · 10-01-2012, 01:52 AM

Check Engine Light - INPA error codes

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Hi Guys,

For the last 2 weeks I have been getting the empty check engine light appear every 5 days or so only to disappear after restarting the car 4 times.

The car seems to run fine and everything appears normal, it doesn't even appear sluggish or anything just the light randomly just turns on when driving normally.

I scanned the car with INPA and got the following error codes..

2AF2 - nitric oxide sensor, Lambda linear
2AF4 - NOXsensor, electrical
2AF6 - nitric oxide sensor, lambda binary

Can you advise whats wrong and whats needed to fix this? i have a 320i n43 2007 69k miles.

Many thanks

JordanM4 · 10-04-2012, 06:04 AM

anyone???

WilliamS · 10-04-2012, 08:25 AM

Could be a sensor is kicking the bucket on you 02 that is, or you have a cat failing. Becuase its all 3 codes I would assume 02 sensor.

Meeni · 10-04-2012, 09:45 AM

Seems to be CAT

JordanM4 · 10-04-2012, 04:00 PM

What makes you think its the CAT as a whole? I was thinking possibly the NOx sensor?

WilliamS · 10-04-2012, 04:04 PM

Im thinking its the sensor becuase of the second code.

JordanM4 · 10-05-2012, 10:44 AM

I've attached a screen from a engine diagnostic page in INPA. As you can see the lambda after bank 2 is not reporting anything? does this make sense to anyone or is that how it is on a 320i?

10-01-2012, 01:52 AM	#1
JordanM4 Private First Class 16 Rep 126 Posts Drives: BMW M4 Join Date: Aug 2011 Location: Essex iTrader: (0)	Check engine light - scanned with INPA and got... Check Engine Light - INPA error codes -------------------------------------------------------------------------------- Hi Guys, For the last 2 weeks I have been getting the empty check engine light appear every 5 days or so only to disappear after restarting the car 4 times. The car seems to run fine and everything appears normal, it doesn't even appear sluggish or anything just the light randomly just turns on when driving normally. I scanned the car with INPA and got the following error codes.. 2AF2 - nitric oxide sensor, Lambda linear 2AF4 - NOXsensor, electrical 2AF6 - nitric oxide sensor, lambda binary Can you advise whats wrong and whats needed to fix this? i have a 320i n43 2007 69k miles. Many thanks
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10-04-2012, 06:04 AM	#2
JordanM4 Private First Class 16 Rep 126 Posts Drives: BMW M4 Join Date: Aug 2011 Location: Essex iTrader: (0)	anyone???
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10-04-2012, 08:25 AM	#3
WilliamS GoofBall 50 Rep 1,055 Posts Drives: 2008 E92 N54 Xdrive Join Date: Jun 2012 Location: Tampa, FL iTrader: (2)	Could be a sensor is kicking the bucket on you 02 that is, or you have a cat failing. Becuase its all 3 codes I would assume 02 sensor.
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10-04-2012, 09:45 AM	#4
Meeni Gateropode 329 Rep 2,846 Posts Drives: BMW 330i 06 Join Date: Apr 2012 Location: TN iTrader: (0)	Seems to be CAT
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10-04-2012, 04:00 PM	#5
JordanM4 Private First Class 16 Rep 126 Posts Drives: BMW M4 Join Date: Aug 2011 Location: Essex iTrader: (0)	What makes you think its the CAT as a whole? I was thinking possibly the NOx sensor?
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10-04-2012, 04:04 PM	#6
WilliamS GoofBall 50 Rep 1,055 Posts Drives: 2008 E92 N54 Xdrive Join Date: Jun 2012 Location: Tampa, FL iTrader: (2)	Im thinking its the sensor becuase of the second code.
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10-05-2012, 10:44 AM	#7
JordanM4 Private First Class 16 Rep 126 Posts Drives: BMW M4 Join Date: Aug 2011 Location: Essex iTrader: (0)	I've attached a screen from a engine diagnostic page in INPA. As you can see the lambda after bank 2 is not reporting anything? does this make sense to anyone or is that how it is on a 320i? Attached Images
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