TDI Stalling/ODB Bypass

I have a 2001 Jetta TDI with 85000 miles on it. Yesterday I was driving down the interstate at about 80 MPH and it started to lose power and stalled. After about 30 seconds I got it to start again and drove for about 3 miles and the same thing happened. I limped it back to town, stalling every 3 miles or so and restarting after a couple of seconds.

It was -10 outside so i thought maybe it was gelling up, so I stopped at a gas station and bought some anti-gel, but it did not help, as a matter of fact the check engine light came on right afterward.

If i kept the car about 2000 RPM's it it took a lot longer to stall. It seemed to be truly affected when I gave it a lot of gas or if it was underpowered (in too high of a gear.)

I had it in my garage (heated) overnight and put a new fuel filter in it and started it up. I have not drove it, as the check engine light is still on.

my question is two part:

1.) I have an aftermarket radio installed by the previous owner. The connector is not there (they cut it off and spliced the wires. Therefore I can not hook up my scan tool. Does anyone know a bypass fot the ODB through the radio?

2.) any suggestions on what the stalling could be?

Thanks.

UPDATE:

I found out how to bypass the radio (disconnecting the grey/white wire)

Anyway, I have a trouble code P1248, which is fuel injection control malfunction"

Any Ideas?

I have a 1999 Jetta TDI that has identical symptoms. My initial thought was to replace the fuel filter. Did replacing the fuel filter solve your problem?

Well,

I replaced the fuel filter and added 911 anti-gel per the bottle reccomendations. Have been driving in -20 conditions and the problem has not returned.

Code 1248 can indicate that the car ran out of fuel. Very possible fuel gelling of clogged filter. Have you checked for water (ice) in the fuel?