Daniel,

Code 2000-12 suggest a problem with communication between the ACU and VSM. Check the connections on the CANBUS system between the two. The VSM is mounted under the kick panel right side. The wires you need are on CPS8, pins 2 and 9. The CPS8 connector is on the right side, forth one down from top. The interface module pins47 and 48 at CRS202. Verify.5 ohms or less from VSM to module. Check green 900 and yellow 901 to make sure they are not shorted together. If all connections are tight and clean, suspect interface module is failing. What engine does the lift have? Serial number would help. Good Luck.