95 awd auto no 3rd/4th gear

[95twinturboawd]

Long story short, put a new filter and fuild and friction modifier, drove and shifted great for a few weeks, then today it wouldn't go into 4th on my way to town then on thr way back it wouldn't go in to 3rd or 4th, so I don't what to check, its a 95 tsi awd stock engine and about 160,000 miles

These cel came on, P0443 purge control valve circuit, P0120 throttle position sensor, P1400 differential pressure sensor circuit.

Could you help me with what I need

Thanks

Jerrid

 

[97gst_spyder]

Have you checked the fluid level?