MAZDA MX5 1.6i 16v 6/96-5/98 (486mm long-round cat). MAZDA MX5 1.8i 16v 6/96-5/98 (486mm long-round cat). A vehicle will fail on this reading if it has HCs in excess of 200ppm. HCs in excess of 60ppm indicates a vehicle problem that needs rectifying as soon as possible.
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