2009 Mazda Miata MX-5 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2009 Mazda Miata MX-5
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2009 Mazda Miata MX-5 ProblemsCheck Engine Light Due to Improperly Manufactured Threads on Fuel Filler Pipe
Some models may have a problem where the Check Engine light illuminates indicating an improperly tightened fuel cap. Due to improperly manufactured threads on the fuel filler pipe, the filler pipe may need to be replaced.
The passages for the Exhaust Gas Recirculation (EGR) system can become restricted or clogged causing the Check Engine Light to illuminate. The EGR valve will need to be inspected and the passages cleaned.