Let's not posts questions about our specific problems in the FAQ. Make a new post in the regular section, please. I've moved this to it's own thread in the regular MKIII section...
Code 51 is A/C switch OR IDL switch (a switch inside the TPS) You can cause this code by pressing the throttle while the engine is in diagnostic mode. Otherwise it's an indicator that the TPS needs to be adjusted (see the throttle body section under EFI in the TSRM).
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.
If you're so inclined I'm always more than happy to accept tips via PayPal. 
Tip Jar ---> 
|