Could installing a TFI cause problems with getting codes? I recently installed a TFI and everything seems to be ok except, I’m getting poor fuel mileage and I recently noticed the check engine light was coming on a few seconds after startup and then go off after 5 or 6 seconds or so. I decided to check for codes and it displayed two. PO261 and PO263. They indicate injector open low EFI. I cleared the codes and restarted and it now has no codes. I’ll have to ride a little more to see if they come back on. I was just wondering if disconnecting the injectors and reconnecting the TFI could possibly cause this.