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Check Engine light 200 1991

I drive a 1991 240 with over 345,000 miles. The car recently threw a Check Engine fault. I checked/diagnosed the codes as a 1-2-1 and a 1-3-1, which are Mass airflow sensor and Ignition system RPM signal. Any ideas on what could be causing these faults?






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New Check Engine light [200][1991]
posted by  Kswisher488  on Tue Dec 11 10:46 CST 2012 >


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