CEL 4D87 and 48D0

demon · 09-22-2021, 01:01 PM

These two CELs will clear but come back on as soon as the engine is started.
Any Suggestions?
Doing some research on this site, it appears these may be caused by Exhaust Backpressure Sensor before the turbo.
It has been raining for a couple of days and can not get my car into the garage. Just where is this sensor located and does anyone have a part number for it? 2011 335D...

TheBigSwede · 09-22-2021, 08:13 PM

Is your DPF in tact?

demon · 09-23-2021, 12:47 PM

yes dpf still intact.

montr · 09-23-2021, 02:29 PM

I had this error before. The sensor was bad. It is cheap but difficult to replace because it is close to the firewall. I got the sensor from Rock Auto Parts

This is the sensor that I replaced
https://www.rockauto.com/en/moreinfo...=19700&jsn=880

demon · 09-23-2021, 04:07 PM

Quote:

Originally Posted by montr

I had this error before. The sensor was bad. It is cheap but difficult to replace because it is close to the firewall. I got the sensor from Rock Auto Parts

This is the sensor that I replaced
https://www.rockauto.com/en/moreinfo...=19700&jsn=880

Thanks I have the air box out and still can not even see this sensor. How do you get to it from under the hood or under the car? Got a picture per chance?

montr · 09-23-2021, 07:56 PM

I went from the top and it was not easy. Here is the DIY that I used.
https://www.e90post.com/forums/showthread.php?t=1660570

TheBigSwede · 09-23-2021, 08:32 PM

Had to replace the hoses on mine last year. Think I had those codes as well. Could audibly detect an exhaust leak in one of the hoses to the differential pressure sensor. AA give you a view of it here https://youtu.be/lYih2U84bK8 .

montr · 09-24-2021, 09:47 AM

Quote:

Originally Posted by TheBigSwede

Had to replace the hoses on mine last year. Think I had those codes as well. Could audibly detect an exhaust leak in one of the hoses to the differential pressure sensor. AA give you a view of it here

.

I also had to replace that same hose at a different time but I think this is for a different sensor and it is unrelated to the code 48D0. The Differential Pressure Sensor in question is further back, near the firewall and has 2 hoses connecting to it.

demon · 10-09-2021, 11:33 AM

Thanks for the replies. I ordered the following and so far it is fixed and pretty easy to change to boot.

Exhaust Backpressure Sensor(BMW)(m)
Part #: 13-62-7-808-013-BOE

It took two weeks to get the sensor but fixed now.
Thanks montr your second youtube was exactly correct.

09-22-2021, 01:01 PM	#1
demon Fukowee Warrior 14 Rep 118 Posts Drives: 2011 335d Msport blk on blk Join Date: Sep 2014 Location: north carolina iTrader: (0)	CEL 4D87 and 48D0 These two CELs will clear but come back on as soon as the engine is started. Any Suggestions? Doing some research on this site, it appears these may be caused by Exhaust Backpressure Sensor before the turbo. It has been raining for a couple of days and can not get my car into the garage. Just where is this sensor located and does anyone have a part number for it? 2011 335D...
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09-22-2021, 08:13 PM	#2
TheBigSwede Enlisted Member 6 Rep 49 Posts Drives: 2009 335d m-sport- JR stg 2 Join Date: May 2015 Location: GTA iTrader: (0)	Is your DPF in tact?
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09-23-2021, 12:47 PM	#3
demon Fukowee Warrior 14 Rep 118 Posts Drives: 2011 335d Msport blk on blk Join Date: Sep 2014 Location: north carolina iTrader: (0)	yes dpf still intact.
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09-23-2021, 02:29 PM	#4
montr Captain 192 Rep 768 Posts Drives: 2010 335d, 2018 430i G-Coupe Join Date: Sep 2009 Location: Atlanta, GA iTrader: (0)	I had this error before. The sensor was bad. It is cheap but difficult to replace because it is close to the firewall. I got the sensor from Rock Auto Parts This is the sensor that I replaced https://www.rockauto.com/en/moreinfo...=19700&jsn=880
	Appreciate 0 Quote

09-23-2021, 07:56 PM	#6
montr Captain 192 Rep 768 Posts Drives: 2010 335d, 2018 430i G-Coupe Join Date: Sep 2009 Location: Atlanta, GA iTrader: (0)	I went from the top and it was not easy. Here is the DIY that I used. https://www.e90post.com/forums/showthread.php?t=1660570
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09-23-2021, 08:32 PM	#7
TheBigSwede Enlisted Member 6 Rep 49 Posts Drives: 2009 335d m-sport- JR stg 2 Join Date: May 2015 Location: GTA iTrader: (0)	Had to replace the hoses on mine last year. Think I had those codes as well. Could audibly detect an exhaust leak in one of the hoses to the differential pressure sensor. AA give you a view of it here https://youtu.be/lYih2U84bK8 .
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10-09-2021, 11:33 AM	#9
demon Fukowee Warrior 14 Rep 118 Posts Drives: 2011 335d Msport blk on blk Join Date: Sep 2014 Location: north carolina iTrader: (0)	Thanks for the replies. I ordered the following and so far it is fixed and pretty easy to change to boot. Exhaust Backpressure Sensor(BMW)(m) Part #: 13-62-7-808-013-BOE It took two weeks to get the sensor but fixed now. Thanks montr your second youtube was exactly correct. Last edited by demon; 10-09-2021 at 11:41 AM..
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