fujxyooj

I have a test pipe and I've had both my o2 sensors replaced and it's still the same code that one of my o2 sensors is bad. Is it the test pipe that is throwing the code or is there something else I need to look into. Can someone help me please...

Thanks...

lilredlude

test pipe

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wrathofshampoo

dude. the ONLY purpose of the second o2 sensor is to read the exhaust gases AFTER it passes through the cat (for emissions, to see that the cat is doing its job to remove pollutants). obviously you dont have a cat so your second sensor is going to just read the same as the first and your obd is going to throw the code. you will keep getting the CEL as long as you dont have a functioning cat unless you do some sort of workaround

MaC77Kron

You just need to remove the second 02 sensor from the exhaust stream, but keep it bolted to the exhaust to ensure it gets to operating temperature. Its only puropose is to detect cat efficiency.

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