check engine light
08-10-2009, 07:19 AM
#1
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check engine light
P0420 code, cat efficiency below threshold bank 1 toyota said the cat need replacement 950$ what do you guys think and if so no a cheeper place for one 994runner limited 3.4
08-10-2009, 07:52 AM
#2
$950 is a reasonable price for a factory cat. There is no cheaper place for a good quality, factory cat. You *can* get cheaper, but the quality is not there and your engine will suffer as a result. Nickle and Iron simply do not keep the engine running as clean and as proper as factory cats (with Platinum and Rhodium)
08-10-2009, 01:15 PM
#3
sounds like you should replace the o2 sensor first. if it has over 100,000 miles on
the sensor the likely problem is the sensor not the cat. 120 bucks for a dealer o2 sensor plus 2 stainless nuts and gasket
the sensor the likely problem is the sensor not the cat. 120 bucks for a dealer o2 sensor plus 2 stainless nuts and gasket
08-13-2009, 11:50 AM
#4
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x2 on this. Changing rear sensor at 110K (front had been done at 90K) cured my P0420 perfectly. I had other codes when I did the front.
will try that one did the front last year 
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