Catalytic Weak Efficiency
#1
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Catalytic Weak Efficiency
Hey guys need some help. bought an 06 evo mr about a month and a half ago without any cats so i had to put a cat on it so i could register it and get a vin inspection done had no CEL's for about 2 weeks now i just popped one saying Catalytic Weak Efficiency. anyone have experience with this? if so please give me some suggestions so this CEL wont pop. thanks a bunch
#4
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If its a stock cat, its bad or the sensor is bad. If its a high-flow cat as the previous poster mentioned, its normal.
If you dont want to modify the ECU, you can get the Vibrant O2 sensor spacer kit to prevent the code. It moves the o2 sensor out of the exhaust flow a bit to make it read lower, thus prevent the code from coming up.
If you dont want to modify the ECU, you can get the Vibrant O2 sensor spacer kit to prevent the code. It moves the o2 sensor out of the exhaust flow a bit to make it read lower, thus prevent the code from coming up.
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