CHECK ENGINE Light

CHECK ENGINE light is illuminated if fault was already stored during last trip. Faults which no longer occur are automatically erased after no more than 40 warm-up phases. A warm-up phase is completed if coolant temperature is less than 95°F (35°C) at engine start and coolant warms up to more than 176°F (80°C).

CHECK ENGINE light will go out if no fault is detected during 3 trips with the same operating conditions. A trip is completed if:

• All checks and function chains of exhaust-relevant faults completed at least once since engine start.
• Time elapsed after engine start is more than 20 minutes.
• Engine temperature is more than 19.4°F (-7°C).
• Engine speed greater than 500 RPM.

Function chains are check sequences activated by the ME-SFI control module for secondary air injection, adjustable camshaft timing, purging and leak check of EVAP system.

If engine misfiring occurs, CHECK ENGINE light will immediately flash. This relates to fault codes P0300 through P0312. For other faults, CHECK ENGINE light will illuminate and remain on. If a fault is recognized, substitute values are used for vehicle operation.

To prevent consequential faults from being stored, if a faulty signal is detected during a trip and the appropriate fault code is stored, all checks are aborted where this signal is required as a comparison parameter.