Question about 2004 Volkswagen Passat
P3081 is the error code for the engine not reaching correct operating temperature. It could be an issue with the thermostat or the ECT (coolant temperature sensor) valve.
As far as how to repair those items, your best bet is to purchase a repair manual. It will save a lot of time and frustration.
Good luck hope this helps.
Posted on May 10, 2010
I had the same problem on my 03' VW Passat with a V-6 engine. The OBD engine check code P3081 indicated and issue with the fuel emission which was related to incorrect engine operating temperature. The radiator cooling fan was always "ON' irregardless of the hot or cold engine temp. Since I had a similar problem on my older 89' Golf Cabriolet, I reckoned it was just a matter of replacing the thermal switch for the radiator fan. I bought a thermal switch from an independent VW parts supplier and had it installed by a mechanic from an independent repair shop. Problem solved! The radiator fan now only turns on when the engine is at the optimal operating temperature and the the code P3081 no longer appears on the OBD scanner.
Posted on Jul 21, 2010
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Posted on Jan 02, 2017
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