I have a problem with the mass air flow sensor where i had to clean it, the car ran fine afterward but soon returned to how it was before, it takes a little bit to get over 30mpg and it's hard getting up steep hills, then one day the hood started smoking and made a loud hissing noise, come to find out it was the secondary air valve and the cap on top had melted and the disk inside distorted, needless to say it had to be replaced, could a faulty air sensor have caused this?
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2002 Pontiac Grand Prix Question: Can a Mass Air Flow Sensor failur cause the Secondary Air Valve to fail?
Answer #1ZeeTech October 14, 2010, 18:05Master
No, it has no direct impact on the Sec. Air Valve.
What usually breaks the SAIS is vapors build up in the pump due to a non-closing check valve. It could cause electrical problem inside the pump. Every time you replace the pump, make sure the check valve (directional valve) is replaced also.