[V8] Fault code 2341

John Bysinger john at bysinger.net
Thu Apr 14 23:56:06 EDT 2005

I would bet that the fuel issue has damaged the o2 sensor (rich exhaust can
do this) they're actually very easy to test.  I'm not sure on the V8 02
sensor how many leads there are, but there's usually either 2 or 4 leads to
them.  In my experience you want to pay attention the the grey and black
leads if there's more than 2, connect them up to a volt/ohm meter set to DC
volts.  Just sitting there it should read out a nice zero.  Set the o2
sensor in a bench vise or some other sturdy mounting, and heat up the sensor
until it's glowing like a cherry with a propane torch or similar (you won't
hurt it, it's used to these temps) and check the voltage again.  The flames
of the torch should be using up all the oxygen around the sensor and the
volt/ohm meter should read just shy of 1 volt.  If you're not getting that
much voltage, or no reading at all, check the leads and try again, if it's
still low or no voltage, time for a new 02 sensor.

I took some pics of this when testing a friend's o2 sensor off a ford probe
a year or so ago if you want to see the bench test in action:


Hope this helps some, might at least save the cost of a replacement sensor.

'90 v8q

-----Original Message-----
From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com]On Behalf
Of pdlord at talent.com.au
Sent: Thursday, April 14, 2005 7:59 PM
To: V8 at audifans.com
Subject: [V8] Fault code 2341

Hey guys, an excellent V8 resource. Very much appreciated when you're on the
other side of the world (Australia) where there are VERY few V8s!

My 1990 3.6 auto has pretty high fuel consumption (about 12mpg around town),
has smoky exhaust haze (a grey colour, does not smell like oil, seems a
consistant volume from idle to redline) most noticable when the engine is
(though noticed a black pool of moisture on the ground under exhaust when
cold)and occasional slight hestitation accelerating off-idle.

Thanks to this site, made a test light, pulled the 2341 code. So it could be
several things, but how can you individually test the FPR and 02 sensor?
of these is the most likely culprit, I reckon).

Compression test done recently, all at 190-200psi, fuel filter replaced
6mths/3000miles ago by previous owner. Fuel pump is noisy, will check filter
screen but over rather than underfuelling seems to be the problem.

Okay, my plan was check connections to 02 sensor and FPR, but are there set
values you can check with a mulimeter to see if the component is functioning

I have a Bentley for my 1992 Passat GL16v, which I have been using for the
as a diagnostic (systems are similar) but obviously it has limitations.
know of a GOOD manual for the V8?


Audifans V8 mailing list
Send posts to: mailto:V8 at audifans.com
Manage your list connection: http://www.audifans.com/mailman/listinfo/v8
Have an Audi V8 question?  Check the Audifans Knowledgebase!
Have a V8 answer? ... Please help others by adding to the KB ... all
contributions welcome!

More information about the V8 mailing list