I just read my CEL code and got 57, I searched and got 3 engine codes:
57
P0340
11-129
11-121
Camshaft Position (CMP) Sensor No Signal

57
P0341
11-130
11-122
Variable Valve Timing Control (VTC) Phase Gap

57
P0344
11-129
11-121
Camshaft Position (CMP) Sensor Intermittent Interruption

Can I check/fix any of these problems or am I better off taking it to a mechanic?
My car is an 02 si w/68k miles if it matters. My car starts but then dies immediatly, thanks in advance for any help.

 

anyone?