Check Engine Light
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2001 BMW Z8, 2001 BMW X5, 2001 BMW M5, 2001 BMW 750iL, and 2001 BMW 740iL. However, it is still accessible from the selected car via links, so may be relevant.
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).