Quote:
Originally Posted by animator
If you're getting a 0420 code, it's most likely not the sensors, as they send their own signal back to the ecm, and if that signal is bad, you'd be seeing a code for the sensor itself, which is a different code from the catalytic efficiency code you're getting now.
Going with aftermarket cats only to have them last less than 5 years is what got me to go with the sim. I may at some point replace them as a pair so I at least know they're both in working order, but until then, the sim gets me through inspection, and that's what matters around here..  |
It depends on how the sensor fails. A bad sensor will commonly throw the 0420 catalyst efficiency code in certain failure modes. That's exactly what mine was doing and the sensor replacement corrected it.
