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VW Golf 2.0 AXW 2004 - Fault code P0191 fuel rail pressure sensor #

Posted by Andy Stimpson on June 10, 2009, 6:26 pm

Year of Manufacture *: 2004
Engine Code or Type *: AXW 2000
( Optional ) Scanner used: Snap On Modis

Hi Guys, Problem I've got is fault code P0191 fuel pressure sensor not a plausable signal. Replaced fuel pressure sensor, road test after approx 7 miles at around 65/70 mph engine pulls back for a few seconds and then is fine for approx 10 miles then does it again. Read fault codes again P0191 faulty fuel rail pressure sensor,is it likely the new sensor could be faulty can we test it? Any help would be appreciated.Many thanks Andy

Re: VW Golf P0191 fuel rail pressure sensor.

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 June 11, 2009, 10:04 am, in reply to "VW Golf P0191 fuel rail pressure sensor."
Sean McGettigan

Hi Andy,
'P0191 fuel pressure sensor not a plausable signal' is a totally differant fault to 'P0191 faulty fuel rail pressure sensor'
The first one is I'm guessing the actual fault description you have and the second is your interpetation of the fault.
Remember the ECU can almost NEVER identify a faulty sensor as there is no DIRECT connection (ie always wiring in between and other parts of the system will affect how a sensor operates or reports its feedback) so a fault code alone cannot identify a faulty sensor.
The ECU is telling you that the output from the sensor which reports the actual fuel pressure is not PLAUSIBLE with what the fuel pressure should be reading under certain conditions.
So you may have an electrical fault with the sensor which would normally report as a sensor circuit fault or you may have a fuel pressure problem.
Hth Sean

Re: VW Golf P0191 fuel rail pressure sensor.

Posted by ian Whitmore <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1710' width='330' height='300' border=0 style='border:none;'> on June 11, 2009, 1:17 pm, in reply to "Re: VW Golf P0191 fuel rail pressure sensor."
Ian Whitmore

Hi
Can we have the VW specific code not a P code

Re: VW Golf P0191 fuel rail pressure sensor.

Posted by Mark carter <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on June 11, 2009, 1:36 pm, in reply to "Re: VW Golf P0191 fuel rail pressure sensor."
Mark Carter

I agree with Sean, the ECU is "seeing" a difference in the actual value and what the "DRV" duty cycle should produce. It is this deviation that is logging the DTC. HTH

Regards Mark.

Modern cars, Its all wizardry and witchcraft

Re: VW Golf P0191 fuel rail pressure sensor.

Posted by martin young <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT2736' width='330' height='300' border=0 style='border:none;'> on June 11, 2009, 8:42 pm, in reply to "Re: VW Golf P0191 fuel rail pressure sensor."
Martin Young

http://wiki.ross-tech.com/index.php/16575/P0191/000401
martin

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