This is an indication of the coolant temperature sensor failure. It is
common with the 2002 EVC. There is a green top sensor available from VW dealer
and many vendors for less than $20 that replaces the black top sensor. You
will also need a new o-ring and a clip to hold the new sensor in the housing.
The sensor is mounted in the thermostat housing on the bottom front of the
engine. Remove the sound-deadening pan. Relieve the pressure from the cooling
system by removing the top of the coolant reservoir. Once you are convinced
that the engine is at a low enough temperature to not repressurize the coolant
system, replace the reservoir cap. Now the tricky part: have the new sensor
and o-ring ready, remove the old one, insert the new one and secure it with
the clip. Having the cap on the reservoir will have prevented the free flow of
coolant out of the thermostat housing hole. Clear your codes (or wait a few
days and CEL will clear on its own).
Good luck. Let us know how it goes.
Bob W.
2001 Weekender
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In a message dated 6/26/2008 11:57:18 A.M. Eastern Daylight Time,
1terryobrien@... writes:
Hi Folks,
I have a 02' EVC with 57,000 on it. I'm the original owner.
Recently had the EPC light come on and off. Intermittment. No error codes
reported when
it illuminated. Periodically happens when driving semi-distant. Short trips
it hasn't come
on.
Then had the CEL come on with a error code of PO172. I cleared the code. It
came back
later that afternoon on a drive. I cleared it again and it hasn't come back
yet.
Prior to this I got an error code of PO118 some time ago. I cleared that and
it hasn't come
back to haunt since.
I searched the archives and found some info but still feel stumped.
Any ideas, suggestions what to chase is greatly appreciated. Especially as
we are in the
season to get on the road. I prefer to deal with this myself rather than
shell out the dealer
bucks.
Thanks
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