Hello, I’m new here and I have a huge problem. I drive a V70 bifuel CNG, 2.4 ccm, built in 2001. I have now more and more often the problem that my car switches to petrol while driving and no longer accepts gas. Neither in gas nor in petrol operation. (Doesn’t really make fun of sneaking over the highway at about 80 km/h and hoping that the next descent is not so far away.) When I turn it off for a short time (about 15 – 20 minutes) and then restart again. Everything is okay again. For an indefinite time. So far he has not shown any error. Since yesterday I have two error messages in the display: 1. Engine system maintenance urgent 2. Emissions maintenance Can someone tell me what that could be? In between he sometimes runs 14 days error-free or even only 1 day.