California Models

Check Engine Lamp:

The check engine lamp, located on the left side of the instrument cluster, is used primarily to inform the driver of a malfunction in the following circuits or functions:
^Air flow meter
^Engine temperature sensor
^Vehicle speed sensor
^ECU calculation function
^EGR function
^O2 sensor
^EGR temperature sensor
^Throttle sensor
^Fuel injector leak
^Fuel injector circuit
It will also flash simultaneously with the red diode on the ECU when extracting codes or when inspecting feedback operation.