1999 Ford Windstar CHECK ENGINE LIGHT

These codes are similar and indicate engine is running too lean. This means you are getting too much air into the throttle body or you may have a vacuum leak. Check your Mass Air Flow (MAF) sensor to ensure it is operating correctly. Unplug it (located on throttle body) and if the RPMs change then you need to replace sensor. If not, MAF sensor is OK. Check for vacuum hose leaks.

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