Hello, my 3 year old V 70 bifuel has an unexplained problem for me. For a few weeks now, the natural gas is switched off and the engine is off during the ride. Then I can only drive in continuous fuel operation. The problem occurs completely arbitrarily. Times after 200 km of motorway drive. Times 5 min after the morning start. No matter, I can’t make out a rhytmus. Also sometimes I can switch to gas again during the ride, sometimes after the engine was off and sometimes only the next morning. At Volvo you changed a dirty gas filter and measured the gas pressure. Problem was solved. Now the error search started again. Maybe it is the evaporator for 1000,- Euro the spare part (schuck!!!) perhaps something else. The workshop does not know exactly. At Volvo intern there is allegedly no chat or some kind of historical error list. Can someone help me, who had already had the problem before and how it was fixed? Class, if one buys a gas car around the half way to drive super then few. And the information has expired on time.