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Is your CAT still ok? I had a Klarius React fitted but the engine management light keeps coming on. However I never changed my O2 sensor
The O2 sensors were not touched. I spoke with Toyota and they mentioned that the sensors have their own fault code, so as it is only P0420 they...
Hi All, my Prius has the P0420 code. The CAT was replaced with the React brand but the light has come back on after only 2 months. Anyone who has...