2002 Volkswagen Golf "p1290 p1292" Questions

...P1290 and P1292 on a 2002 Volkswagen Golf 1.6, however none of these have worked, can you please tell me what i need to do they need to be reset after the problem sensor or part is replaced.if you ...

P1290 CNG Fuel Pressure Too High P1291 No Temp Rise Seen From Fuel Heaters P1292 CNG Pressure Sensor Voltage Too High P1293 CNG Pressure Sensor Voltage Too Low P1294 Target Idle Not Reached P1295 No 5

...P1290 CNG Fuel system pressure too high P1291 No Temp rise seen from intake heaters P1292 CNG Pressure sensor voltage too high P1293 CNG Pressure sensor voltage too low P1294 Target idle not reached ...