Yesterday I replaced the flame trap box and had to remove the egr valve. After I replaced it The check engine light came on for a egr temp. sensor faulty signal. I may have damaged it in removing the piping to the valve (guess the hammer was to big afterall).

I got a quote from the dealer and the sensor is almost $200.00 dollars.
Does anyone know where I can find a used sensor. From what I hear the sensor rarely fails on its own.