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do you know how to pur your ECU in diagnostic mode?

let the engine warm up for about 15 minutes and shut it off. then pull the right panel off your center console.. you'll see a screw on the side of the ECU.
turn it fully clockwise and back, then start the car.

the CEL should be blinking somewhat random. the CEL is tied directly to the O2 sensor output.. if it's working properly, it will usually run rich when you're flooring it to rev the engine, then will run lean when you let off the gas..while the car is idling, it should flash on and off about once or twice every second as the ECU is constantly adjusting the fuel mix...

If you see that, then your O2 is working. If you don't see that, then it's dead.

easiest way to check right there.
 
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