Check Engine Code P0412

scotty96lsc

scotty96lsc

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As an update, the check engine light came on today. I pulled into autozone and they grabbed the code P0412 - Secondary Air Injection System Switching Valve 'A' Circuit. I previously had P1451 - EVAP Control System Canister Vent Solenoid Circuit Malfunction.
Car sporadically idles rough and accelerates rough around 40-50 mph.
Any suggestions of what my next step should be would be appreciated.:confused:
 
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Ok, my Mark is at the dealer now. Seems to be an "exhaust fumes" leak somewhere along the system. Still haven't narrowed down the area.
 
Dealer could not find a leak. No where, No how. But they did find a bad coil on #3 spark plug. This is what I figured it was to begin this mechanical needle-in-a-haystack hunt. That is two in two years. I would suspect I should just change the rest of them out and be done with it.
 
scotty96lsc said:
Dealer could not find a leak. No where, No how. But they did find a bad coil on #3 spark plug. This is what I figured it was to begin this mechanical needle-in-a-haystack hunt. That is two in two years. I would suspect I should just change the rest of them out and be done with it.
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Didn't I read in another thread that those coils can be tested for free? If so, you should have them all tested and go from there...save some bucks.
 
Unfortunately I did that, however, it wasn't giving back a code that told me I had a cylinder problem. So I had to take it into the dealer ...
 
Hubby just got all new coil packs for my car. Considering we just kept having probs with them one after the other, it seemed reasonable I guess just to replace them all. Well, he hasn't replaced them yet, but there is a box in my living room which has the new ones.
 
I've replaced the coils on cylinders 5 and 3 so I just need to do six more. I think you are right Sharon that might as well replace the rest of them.
Where did you get them? Price per coil is????
This time it cost me $245 out the door, and that is with my military discount from the dealership.
 
Max originally quoted me $43, but charged me $55. I emailed him last week to get it straightened out but no response yet. I am calling him on Monday. I changed out the remaining 6 original coils today. The car runs much better now that all the coils are new.
 
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