Discussion Starter · #1 ·
2004 X5 had "Service Engine Soon light. Ran smoke test and replaced fuel injectors. Car now runs great, no codes, no malfunction indication, but CAT, Evap, O2 and O2 Heat monitors check as incomplete. After a couple of drive cycles, all monitors checked ready except the catalyst monitor. Ran another couple drive cycles and CAT, Evap, O2 and O2 Heat monitors check incomplete again. What could cause monitors to go from ready to incomplete and Cat monitor to not come ready?