it failed smog with high HC at 25mph(57 vs. 62). at 15 mph it'a at max at 92. Changed oil, pvc valve, cap n rotor, plugs, and wires week ago. changed O2 sensor yesterday. 'C' catalyst monitor is blinking in car reader. no codes or cel. In CA, should all the "Readiness Monitor" be available? thank you.
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1995 Nissan Sentra Question: Failed SMOG due to HC level at 25 mph.
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