Have 3 blink codes on a 94 jetta..help please

I have a 94 jetta with the 2.0 manual trans.. i got the blink codes out of it and need to know what they mean.....the codes were 2-1-1-1, 2-2-3-1, and 2-1-1-3....any help at all would be appreciated...

2111 Engine speed sender. (RPM)

2113 Hall sender - No speed signal from distributor; check Hall sensor and circuit.
Air-flow sensor plate is not moving freely; adjust potentiometer or lever.

2231 Idle-speed stabilizer adjustment limits exceeded; too-fast idle. Adjust throttle for full closing, check for vacuum leak, check ignition timing.
Or Air Mass Sensor - Check sensor and wiring.

dude..thanks alot for the help....would the hall sender and the speed sensor ones be on because the engine isnt runnung when i check the codes? ill definitly check the others because sometimes it does idle erratically and other times its fine....maybe its a dirty throttle plate or somethin....cool thanks man....

No problem, It's unlikely the codes are on because the car is off. Check for power to the hall sensor using a multimeter also.

k....ill try that....thnx again...I may need more help..lol

Never a problem. I will help as much as I can.