Good morning!

I have a problem with a Fiat Panda 2009 CNG (188A4000) 44kw

The CNG pressure sensor does not detect the pressure from the CNG cylinder delivery pipe and does not allow switching from petrol to CNG. The problem gradually got worse. At times when running on natural gas it would automatically switch to petrol, at times it would not allow the changeover even after the first start, remaining with only the switch led lit on petrol.

I've already replaced everything with a sister panda: injector rail with pressure sensor, CNG control unit, reducer with pressure sensor, CNG cylinder solenoid valves.

Error found in methane control unit: lack of methane pressure.

What should I do?

thank you