I have a 2000 Grand Prix and came up with the codes 102,412,418,and 443 all in the same day. I'm curious if replacing the MAF (I cleaned it already) will eliminate the other codes or vice versa. How would I go about fixing 412 which is secondary air injection system switching valve A circuit malfunction? Any help would be great!
update: I bought a used MFA and installed it and all of the above codes still came up on the scanner! I really need some help with this one. Something tells me the last 3 codes are causing the 102 (mfa) code to come up. HELP!!
Also, when the car is in gear at a red light the idle will jump up and down from 500 to 1500 rpm. I unhooked the mass air flow sensor and the smaller sensor in between the filter and manifold. It now starts easier when cold but obviously I haven't fixed anything. Plugs and wires are new also new air filter.
update: I bought a used MFA and installed it and all of the above codes still came up on the scanner! I really need some help with this one. Something tells me the last 3 codes are causing the 102 (mfa) code to come up. HELP!!
Also, when the car is in gear at a red light the idle will jump up and down from 500 to 1500 rpm. I unhooked the mass air flow sensor and the smaller sensor in between the filter and manifold. It now starts easier when cold but obviously I haven't fixed anything. Plugs and wires are new also new air filter.
Jul 18, 2007 at 4:16 PM