Check Engine Light
CHECK ENGINE or Malfunction Indicator Light (MIL) is illuminated when any of the following occur:
- Completion of the next consecutive driving cycle where the previously faulted system is monitored again and the emissions relevant fault is again present. See Fig 1.
- Immediately if a catalyst damaging fault occurs.
- A malfunction of a component that can affect the emission performance of the vehicle occurs and causes emissions to exceed 1.5 times the standard.
- Manufacturer-defined specifications are exceeded.
- An implausible input signal is generated.
- Catalyst deterioration causes HC-emissions to exceed a limit equivalent to 1.5 times the standard.
- Misfire faults occur.
- A leak is detected in the evaporative system.
- The oxygen sensors observe no purge flow from the purge valve/evaporative system.
- Engine control module fails to enter closed-loop operation within a specified time interval.
- Engine control or automatic transmission control enters a limp home operating mode.
- Key is in the ignition on position before cranking (Bulb Check Function).