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BMW 320D 2003 - Fault code PO800 #

Posted by Pete Mutlow on April 26, 2010, 3:17 pm

Year of Manufacture *: 2003
Engine Code or CC *: 2.0 Ltr
( Optional ) Scanner Used: CReader V

Can anyone tell me what this fault code is all about please. It popped up CReader V but not on either ACR4 G2 or ACT2. Car runs fine before and after re-mapping and was there prior to re-map. The query is out of curiousity and might be just a software error. I am aware the vehicle is before EOBD compliancy.

Regards

Pete M

PS. There is an old saying about curiosity killed the cat!

Re: BMW 320D - Fault Code PO800

Posted by Mark Carter <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on April 26, 2010, 5:43 pm, in reply to "BMW 320D - Fault Code PO800"
Mark Carter

Is it an auto by any chance?

Regards Mark

Modern cars, Its all wizardry and witchcraft

Re: BMW 320D - Fault Code PO800

Posted by Pete Mutlow <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1569' width='330' height='300' border=0 style='border:none;'> on April 26, 2010, 7:19 pm, in reply to "Re: BMW 320D - Fault Code PO800"
Peter Mutlow

Hi Mark,

This thing has a manual gearbox. I am a bit irked by this because I have seen something relating to this fault code with BMW's whilst looking for something else. I have a feeling that it is a code relating to something that is not fitted such as A/C on some vehicles (Rovers).
Anyway, I shall have a root about tomorrow morning and will post any findings.

Thanks for your interest.

Regards

Pete M

Re: BMW 320D - Fault Code PO800

Posted by Mark Carter <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on April 26, 2010, 8:09 pm, in reply to "Re: BMW 320D - Fault Code PO800"
Mark Carter

HI Pete,
As far as I know all P800 codes relate to transmission/transfer box issues.
Your idea may be right, its time to test it with a dedicated scan tool and not a generic one.HTH

regards Mark

Modern cars, Its all wizardry and witchcraft

Re: BMW 320D - Fault Code PO800

Posted by Darren Bamford <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5465' width='330' height='300' border=0 style='border:none;'> on April 26, 2010, 9:06 pm, in reply to "Re: BMW 320D - Fault Code PO800"
Darren Bamford

Come on Pete, What do you really expect from a £50 DIY code reader , I cannot believe you are even wasting time on this.....

just for future reference

all petrol engines after 2001 had to be EOBD compliant.

all diesel engines after 2003 had to be EOBD complaint.

the Structure of the DTC is Standard and cannot have any deviation .

B Body
C Chassis
P Power-train
U Network (UART)

Generic (normally P0xxx) The definition for the code is defined in the EOBD / OBDII standard and will be the same for all manufacturers.

Manufacturer-specific (normally P1xxx) Where manufacturers feel that a code is not available within the generic list, they can add their own codes. The definitions for these are set by the manufacturer.

The third character defines the specific system or sub-system within the car where the problem is located

P01xx Fuel and Air Metering
P02xx Fuel and Air Metering (injector circuit malfunction only)
P03xx Ignition System or Misfire
P04xx Auxiliary Emission Control System
P05xx Vehicle Speed Control and Idle Control System
P06xx Computer Output Circuits
P07xx Transmission
p08xx Transmission

So if P0800 is the actual code then it must be Transmission related error , just like Mark has already stated.

But very high probability it is duff info from cheap scan tool...

HTH

Darren..

Re: BMW 320D - Fault Code PO800

Posted by Pete Mutlow <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1569' width='330' height='300' border=0 style='border:none;'> on April 26, 2010, 10:35 pm, in reply to "Re: BMW 320D - Fault Code PO800"
Peter Mutlow

Mark,

Point taken ... thanks.

Darren,

This £50 scan tool which you think is a waste of time is used primarily for graphing purposes for such items as HO2 sensors, MAP, MAF, CTS etc and as such is a convenient piece of kit for "1st look" purposes. If I find something which require detailed examination then I would then set up and use Pico.

As far as fault codes are concerned, again it is used as "1st look" backed up by ACR G2. This is the first time it has shown something that G2 has not - hence my interest. I have also intimated in my first post that I believe this to be a software error somewhere and also that this vehicle is pre-EOBD. So although I thank you for your lesson in the details of EOBD protocol, I am already well versed in it.

Regards

Pete M

Re: BMW 320D - Fault Code PO800

Posted by Sean Mc Gettigan <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5291' width='330' height='300' border=0 style='border:none;'> on April 27, 2010, 9:47 am, in reply to "Re: BMW 320D - Fault Code PO800"
Sean McGettigan

What were the emissions Pete?

Regards
Sean

Re: BMW 320D - Fault Code PO800

Posted by Andrew Ruellan <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5382' width='330' height='300' border=0 style='border:none;'> on April 27, 2010, 6:41 pm, in reply to "Re: BMW 320D - Fault Code PO800"
Andrew Ruellan

You beat me to it Sean

Re: BMW 320D - Fault Code PO800

Posted by Pete Mutlow <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1569' width='330' height='300' border=0 style='border:none;'> on April 27, 2010, 9:44 pm, in reply to "Re: BMW 320D - Fault Code PO800"
Peter Mutlow

Evening All,

Fault Code PO800 - Transfer Box Control System (MIL Request)

I have no idea what ramifications this has because the car drives well and the owner has never had any problems with it. So I will leave that there and put it down as a software bug somewhere unless someone can tell me otherwise.......!

Thanks for your interest including Sean and Andrew who I know like to add their informative snippets

Regards

Pete M

Re: BMW 320D - Fault Code PO800

Posted by Mark Murphy <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1035' width='330' height='300' border=0 style='border:none;'> on April 27, 2010, 10:27 pm, in reply to "Re: BMW 320D - Fault Code PO800"
Mark Murphy

Sean & Andrew
Do you mind me asking what your theory is?
Mark

Re: BMW 320D - Fault Code PO800

Posted by Pete Mutlow <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1569' width='330' height='300' border=0 style='border:none;'> on April 27, 2010, 11:11 pm, in reply to "Re: BMW 320D - Fault Code PO800"
Peter Mutlow

Mark,

I think you will find that they were trying to take the "Michael".

Regards

Pete M

Re: BMW 320D - Fault Code PO800

Posted by Michael Whitworth <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5568' width='330' height='300' border=0 style='border:none;'> on April 28, 2010, 12:06 am, in reply to "Re: BMW 320D - Fault Code PO800"
Mike Whitworth - Administrator

>>>>>I think you will find that they were trying to take the "Michael".<<<<<

Never!!!

Not Andrew!

Mike

M.O.M. Miserable Old Manc

Re: BMW 320D - Fault Code PO800

Posted by Mark Murphy <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1035' width='330' height='300' border=0 style='border:none;'> on April 28, 2010, 9:25 pm, in reply to "Re: BMW 320D - Fault Code PO800"
Mark Murphy

Who's Michael???

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