Solid lighting engine after that starts indicates that the system on-board diagnostic (OBD-II) has detected a malfunction. Refer to on board diagnostics (OBD-II) in chapter maintenance and specifications. If the light is blinking, Engine misfire is occurring that can damage the catalyst. 2009 Ford Ranger owner's Manual, service engine soon: the mechanism of indicator service soon light illuminates when the ignition is first turned to the on position to check the bulb and to indicate whether the vehicle is ready for inspection and maintenance (I/M) tests. Typically, the service engine soon light will stay on until the engine is cranked, then disconnect if no breakdowns are present.
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