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  #1  
Old 11-02-2012, 11:40 AM
elester12 elester12 is offline
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Anyone Have The Follow Fault Codes?

Hello all,

My check engine light comes and goes normally but has finally decided to stay on. I scanned it with my bavarian technic tool and found the codes 4D02 and 4804. It's in German but translated it says, "Reducing-agent pressure buildup".

Anyone know which SCR pipe would have the buildup? I've about had it with this car.
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  #2  
Old 11-02-2012, 12:41 PM
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floydarogers floydarogers is offline
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Have you had the recalls done? If not, get it done - they change the injector. If yes, you should be covered by BMW's warranty on replacement parts.

If you're below 70K miles and in one of the 13 CA emissions states (Maryland is one), you're covered, too.
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  #3  
Old 11-02-2012, 05:00 PM
GreekboyD GreekboyD is offline
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Closest fault codes I see on the list are:

4D03 Exhaust Backpressure Sensor Bank 1

4803 Torque Control ACC

480A DPF -Bank 1

I'd say it's related to your DPF.

Last edited by GreekboyD; 11-02-2012 at 05:04 PM.
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  #4  
Old 11-08-2012, 10:42 AM
elester12 elester12 is offline
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Fault codes 4D02 and 4804 are related to the urea pump under the rear of the car. The pump was not building up pressure. You have to drop the exhaust to get to the pump above the tanks. 6 hours of labor plus 300 ish for parts if you have this done out of warranty at a BWM dealer.

I'm praying for a service manual to be written for this car.
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  #5  
Old 11-08-2012, 06:21 PM
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Flyingman Flyingman is offline
hang up and drive!
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Quote:
Originally Posted by elester12 View Post
Fault codes 4D02 and 4804 are related to the urea pump under the rear of the car. The pump was not building up pressure. You have to drop the exhaust to get to the pump above the tanks. 6 hours of labor plus 300 ish for parts if you have this done out of warranty at a BWM dealer.

I'm praying for a service manual to be written for this car.
Extended warranty, get it!
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  #6  
Old 02-08-2013, 07:29 PM
quasimodem quasimodem is offline
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Quote:
Originally Posted by elester12 View Post
Hello all,

My check engine light comes and goes normally but has finally decided to stay on. I scanned it with my bavarian technic tool and found the codes 4D02 and 4804. It's in German but translated it says, "Reducing-agent pressure buildup".

Anyone know which SCR pipe would have the buildup? I've about had it with this car.
I cant figure out what 4804 is and I have it showing. I also have 4A66 and 4B90. The first appears to be Power Management Vehicle Electrical system (maybe an old battery) and the second is Rail Pressure Control at Engine Start.

Quote:
Originally Posted by elester12 View Post
Fault codes 4D02 and 4804 are related to the urea pump under the rear of the car. The pump was not building up pressure. You have to drop the exhaust to get to the pump above the tanks. 6 hours of labor plus 300 ish for parts if you have this done out of warranty at a BWM dealer.

I'm praying for a service manual to be written for this car.
Yikes. Any idea what parts need to be replaced, the entire DEF pump? Or just a valve cleaning?

Okay, see ETK printout below. I see two main suspects -- the pump unit (16197205041 $507.84 at Tischer) and the Supply Module (16197244137 $299.45 at Tischer), any guesses as to which would be causing a 4804 fault code?
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Last edited by quasimodem; 02-08-2013 at 09:14 PM.
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  #7  
Old 06-23-2013, 08:25 PM
quasimodem quasimodem is offline
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Bump, any resolution to the 4804 question? Is it the pump unit or the supply module?
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  #8  
Old 06-23-2013, 09:00 PM
Hoooper Hoooper is offline
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This is the most complete list ive seen but no 4804 http://www.endtuning.com/bmwcodes.html#DDE6
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  #9  
Old 12-21-2014, 01:00 PM
9mmkungfu 9mmkungfu is offline
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Was this ever resolved? If so, could you post the details?
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  #10  
Old 01-21-2015, 06:35 PM
9mmkungfu 9mmkungfu is offline
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Still interested in the 4804 code if anyone else has seen it.
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  #11  
Old 05-22-2016, 11:12 AM
dadasracecar dadasracecar is offline
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I have this code now persistently. Any information from those that have had this situation resolved would be greatly appreciated. TIA.
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  #12  
Old 05-23-2016, 03:57 AM
9mmkungfu 9mmkungfu is offline
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I ended up removing the SCR system and haven't had any related codes since.
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  #13  
Old 01-18-2017, 08:39 PM
rs0xn rs0xn is offline
DO IT
Location: New England
 
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Mein Auto: 2011 X5 3.5d
I have a 2011 x5 35d. I get this error 4804 every time this year in January. This is the second year I've gotten it. The cold weather and thawing and back to cold seems to trigger something. Car is not under warranty anymore, bmw said to replace scr module sensor. My Indy mechanic said monitor it and replace if needed. His price was $1400 parts labor. After clearing the error last year it went away, but has resurfaced today. I use the Carly app to clear code. Is there any long term problems that could damage vehicle by clearing fault and ignoring issue. Like I said it only happens at beginning of winter here in CT. I'm also driving 15 miles city to from work. Not sure if car has enough miles / heat to start regen the filter and burn off diesel crud.

Is this just an emissions issue? Is Connecticut within the 13 states you referenced?

Does anyone have the recall number or something I can reference back to bmw about this recall I keep hearing about. The x5 just had a 60k mile service done by my Indy shop.


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