850T with 2-3-1 code

Pauly · Post by **Pauly** » 27 Jun 2006, 06:21

I still get code 2-3-1 in socket A2, after recently relacing the front O2 sensor and throttle position sensor because of some other codes I had. The car runs fine. What's causing this "Long term fuel trim part load at upper or lower limit" fault?

White850Turbo · Post by **White850Turbo** » 27 Jun 2006, 06:42

Quite possibly a vacuum leak. Carefully inspect all of the vacuum lines in the engine bay for leaks. One of the most common spots for leaks is the vacuum elbow on the passenger side of the intake manifold; kinda tough to get to.