[aaaaaaaaaz]

After 200 miles my 50e also had check engine light on… however it seems not the hybrid battery coolant issue, but fuel rail sensor. This is kind of weird - the whole trip was in EV mode without engine turning on for 20+ miles. Suddenly a message on dashboard shows “electric mode not possible due to system issue” and CEL comes on, car goes into hybrid mode. After a few minutes, I tried to go into electric mode again and it seems possible again, however the CEL is still on. I had a $25 Amazon scanner and got the error code, and it is the only error message. Weird. Fuel rail error thrown in EV mode.

[walketed]

Wow.. did you clear the error and is it still there? Do you notice any problems with the car?

[aaaaaaaaaz]

Originally Posted by walketed

Wow.. did you clear the error and is it still there? Do you notice any problems with the car?

light is still on overnight but cannot notice anything unusual... all drive mode still drives fine.

I guess it is just some random false error code thrown; Idk why gas engine code is thrown when the engine was not even running when car was driving in ev mode.

Will take to dealer service dept if it does not disappeared within next day or two.

[walketed]

Good idea.. their scanner maybe has a better detail of the problem..

[GoldfishTX]

Originally Posted by alanzyy

I guess it is just some random false error code thrown; Idk why gas engine code is thrown when the engine was not even running when car was driving in ev mode.

Looks like a fuel rail pressure sensor error, and I'm guessing the rail and fuel system is pressurized even when running in EV mode. Otherwise the transition to hybrid would be bad.

[aaaaaaaaaz]

Originally Posted by GoldfishTX

Looks like a fuel rail pressure sensor error, and I'm guessing the rail and fuel system is pressurized even when running in EV mode. Otherwise the transition to hybrid would be bad.

Thanks for the explanation, that sounds like making senses. I googled the error code and seems like no one else has mentioned or experiences this on modern bmw, phev or not; only discussion was on E-series M3