My Check Engine light came on solid, 6 days ago. The cars driveability has not changed, acceleration good, fuel consumption nominal, idle OK, 600 RPM, smooth engine, no hesitation nor straining, nor knocking. (pre-ignition).
I use Good Quality fuel, SUNOCO, 94 Octane, almost all the time.
I took the car in to the dealer today and had them read the codes, $48.00.
They say, Catalytic Converter, $916.00, Rear O2 Sensor, $207.00 and Knock Sensor $518.00.
The codes read out were, Catalytic - 2 events, O2 - 2 events, Knock - 1 event.
Earlier this year, I put an aftermarket, custom made F-Pipe on the car, without mini-cat's, I have put over 15,000 Km on the cars since then, with no Check Engine lights coming on at all.
My current thinking is that the O2, sensor may actually have gone bad, and that this causes the catalytic to look bad due to a difference between the front ad rear units and the knock sensor was just a random occurrence.
I'd like to hear the opinion of some others here and how easy it would be to do some work myself, aka, O2 Sensor, knock sensor.
rtt