I had the same thing happen to me, so i would say its safe to say
any part can go bad..

just my 2cents :)
Joe

-----Original Message-----
>From: Jeff Lincoln <magikvw@GMAIL.COM>
>Sent: Jul 10, 2007 6:53 PM
>To: vanagon@GERRY.VANAGON.COM
>Subject: Temp 2 Sensor Questions
>
>Well, back in late April or Early May I replaced the Temp 2 Sensor and it
>cured what ailed my 90' with the rough rich running and back firing. It was
>great. Well, a couple weeks later it started doing the same thing again.
>Common sense says it was the Temp 2 sensor agin - but I have no common sense
>and thought it couldn't be because it was just replaced. Well, I just put in
>a new sensor and sure enough that seems to have been the problem again.
>Someone suggested that sometimes the sensors can be bad off the shelf. That
>may be the case - however I was also wondering if there is something else
>that could have made the new sensor go bad so quickly?
>
>What does everyoneout there think? Can something make the sensor go bad
>within a short period of time or did I just get unlucky and get a poor
>sensor to begin with?
>
>--
>Thanks,
>
>Jeff
>90' Carat (It's Blue, It's Beautiful. Now sporting a very unstylish brown
>interior taken from the parts bus)
>86' (We call this one Parts)
>85' GL (Sidelined and feeling neglected)