Hey,

 

My wife just called me and said that she had Check engine warning on and the OBD reader showed P0191 fault (Fuel Rail Pressure Sensor A Circuit Range/Performance). Otherwise everything was OK - car started fine and it was driveable as usually.

Tried to search on the Internet but found rather different experience - one had poor wiring, another had faulty fuel tank pump etc.

 

I guess that in my case it could be some wiring or something similar because today there's a heavy rain and last year I had some nasty experience with electronics and all that usually happened in such a weather but. I didn't solve that because everything luckily ended.

 

But... Recently I changed the battery. OK, I've driven some 500 km after that but could that be the cause?

Fuel pressure check to start with. range perfomance could mean the fuel pressure is just low from the HP pump.

After creating the topic I started thinking hard about what was done last year during those nasty months. And I guess that this specific device was changed because I had problems with that. At least the garage guy said it was some fuel pressure regulator or so.

Somehow it's a great coincidence that these problems appear only when the weather is bad (usually wet). Somehow I don't believe that fuel pressure is affected by that. Probably there are some faulty wires or so...

 

I remember the last year and it was quite a nightmare. That mentioned thing changed, throttle as well. Checked even ECU - was found to be fine.

Cant diagnose anything with guesswork, needs testing with equipment and getting to the cause of the issue.

Disappeared in the evening. Car starts fine, driveable as usually. Probably caused by rain/humid weather.

Will continue to watch.