2018 Can am Defender Lone Star Edition. Had a check engine light on. It would start for a second and die. I used a shot of starting it would then stay running. I got a code P0131. I put a new O2 sensor. It still did the same. It ran like it was starving for fuel. Got another code P1171. I changed the fuel screen. Now it won’t start at all. It runs on starting fluid but not on gas. I put a new fuel pump in it. Still won’t start. Not sure what to do now.