Hey all. I’m new here and new to the land cruiser lifestyle. I just got a 1993 land cruiser from my brother and had the engine rebuilt at Cane Toyota in Long Beach. After 6 months I got the vehicle back but today the check engine light came on. I was able to use the paper clip method to get the analog codes and saw the check engine light flash 3 times (pause) once (pause) 7 times ( pause) once. I’m assuming this means I have codes 31 and 71. Any advice as to what could cause this? Having just paid for an engine rebuild I am a bit concerned