Hi, i've been reading a few related posts and its looking like the CAT or LAMBDA or possibly both the emission results read FAST IDLE CO 0.3 FAIL HC 200 FAIL LAMBDA 1.03 FAIL natural idle test CO .35 PASS
fast idle CO 3.95% HC 207ppm LAMBDA 0.91 natural idle CO 0.16% does using super unleaded damage the lambda? Read up on lambda's they normally need changing between 30 n 50k my mileage is 61k i had a diagnostic guy try to read the ECU but it kept kicking him out does the red master key need to be used to read it?