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V6 Camaro monitors and p0420
Ok, I bought a 99' v6 Camaro I keep getting two codes P0420 and P0420(pending), catalyst efficiency low. I got this after one drive after resetting the computer. I looked though the monitors and this is what I found: "Monitors are ready. Misfire Ok Fuel System Ok Comp Com Ok Catalyst Ok Heated...- Mechanicboy
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