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2000 TOYOTA 4RUNNER 3.4 CAT MONITOR
there are 2 twc cats front and rear 1 a/f in front of both and 1 o2 sensor after rear cat how can you check out which cat is setting the p0420 code (note) i see lots of 3.4l toyotas in this year range with this setup Login to read more. ![]()
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