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Audi A4 3.0 V6 ASN 2001 (51) - Fault codes P16409 & P0025 - Fixed #

Posted by Paul Goswell on May 4, 2010, 11:44 am

Year of Manufacture *: 51 plate
Engine Size and Code *: asn

Engine code P16409 bank 2 cam B (exhaust) advance set point not reached (over retarded)

P0025 lower limit reached can any one explain thiscode to me i cant find any reference to it anywhere

Thanks Paul

Re: audi a4 3.0 v 6

Posted by Mark Carter <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on May 4, 2010, 12:31 pm, in reply to "audi a4 3.0 v 6"

Hi Paul, the vehicle is fitted with VVC and the fault codes are telling you that the engine management system has logged a problem with the operation of the VVC system.
If you read the fault code word for word, you will find that the Engine management system is not able to move the exhaust camshaft for bank two, ie; is not advancing as it should, these systems are controlled by a solenoid control valve which will have NBV at one terminal and a PWM signal on the other. It is probably time to get the scope out. HTH

Regards Mark.

Modern cars, Its all wizardry and witchcraft

Re: audi a4 3.0 v 6

Posted by Michael Whitworth <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5568' width='330' height='300' border=0 style='border:none;'> on May 5, 2010, 10:09 am, in reply to "Re: audi a4 3.0 v 6"
Mike Whitworth - Administrator

Hi Paul,

What equipment are you using to exract DTCs?

The reason I ask is you seem to have mixed up 2 formats of DTC?

P codes consist of 1 letter and 4 numbers, so either you have made a typing error or your scantool is reprting incorrect codes.

VAG DTCs usually consit of 5 numbers so is it P1xxx or is it 16409. I cannot find a deffinition for 16409! I would suggest you try using VCDS or Autologic if you can get your hands on one to confirm DTCs.

And as Mark says look at operation of valve timing solenoids.

Mike

M.O.M. Miserable Old Manc

Re: audi a4 3.0 v 6

Posted by Mark Carter <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on May 5, 2010, 10:22 am, in reply to "Re: audi a4 3.0 v 6"
Mark Carter

Hello Michael,

P0025 is a valid "P" code, "camshaft timing advance" (bank 2) target value not attained.

P0015 is the same fault for bank 1.

Regards Mark.

Modern cars, Its all wizardry and witchcraft

Fixed #

Posted by Paul Goswell on May 19, 2010, 11:23 am, in reply to "Audi A4 3.0 V6 ASN 2001 (51) - Fault codes P16409 & P0025 #"
Message modified by board administrator May 19, 2010, 4:14 pm

FIXED i reread codes and it came up with misfire on cyl 123 no mention of cam sensors changed coil and plugs still the same found a audi forum which mentioned a ecu reflash to reset cam sensors which some times is required after cam belt replacement which i did fit new cam belt 40,000 miles ago it said to disconnect battery and join pos and neg leads together and it seems to have worked i did check cam belt condition just in case it was flapping about but all ok

Re: audi a4 3.0 v 6

Posted by Michael Whitworth <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5568' width='330' height='300' border=0 style='border:none;'> on May 20, 2010, 8:06 pm, in reply to "Re: audi a4 3.0 v 6"
Mike Whitworth - Administrator

Hi Mark,

I missed your reply before,

>>>>P0025 is a valid "P" code, "camshaft timing advance" (bank 2) target value not attained.<<<<

I agree, I was not questioning that code although Pauls description differs somewhat from yours

>>>>Engine code P16409 bank 2 cam B (exhaust) advance set point not reached (over retarded)<<<<<

It was this code I was questioning......

Mike

M.O.M. Miserable Old Manc

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