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BMW Diesel Owners / Enthusiasts
Do you own a diesel powered BMW? Maybe a 335d or a BMW x35d? Come and talk about what makes your car great!

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  #1  
Old 11-02-2012, 11:40 AM
elester12 elester12 is offline
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Location: SoCal
 
Join Date: Sep 2005
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Mein Auto: Pinto
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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Location: Renton, WA
 
Join Date: Oct 2010
Posts: 3,561
Mein Auto: 335d, 328d, Toyota T100
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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Location: Toronto
 
Join Date: Jan 2012
Posts: 537
Mein Auto: 2009 BMW 335d
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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Location: SoCal
 
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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!
Location: Miami
 
Join Date: Sep 2009
Posts: 1,945
Mein Auto: 335d
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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Location: N. Cal.
 
Join Date: Nov 2011
Posts: 93
Mein Auto: 2009 335d
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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Location: N. Cal.
 
Join Date: Nov 2011
Posts: 93
Mein Auto: 2009 335d
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 online now
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Location: CA
 
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Posts: 323
Mein Auto: 335D
This is the most complete list ive seen but no 4804 http://www.endtuning.com/bmwcodes.html#DDE6
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