Help, crazy knock sensor reading, low 02 sensors

fuentes2s · 10-11-2022, 12:53 PM

The test pipes have extensions for the 02 sensors, its not the test pipes.. Did you see the picture? My knock sensor reads 12k lol, code occurred even when I had cats.

THE BULL · 10-11-2022, 01:51 PM

Many times this could be due to an exhaust leak if wiring checks out.

Spaced out 02s should work.

A vacuum cleaner on blow through the mufflers + some soapy water at your exhaust flanges will point out if there are any exhaust leaks.

Lastly a measure of your Fuel trims will point if this is an exhaust issue created by an intake leak.

fuentes2s · 10-11-2022, 03:12 PM

Fuel Trims b1 and b2 are in the picture. The percentage between them is way off, what should they be at? One says 118% and the other 98%.

10-11-2022, 12:53 PM	#1 (permalink)
fuentes2s Base Member Join Date: Nov 2021 Location: Los Angeles Posts: 12 Drives: 2012 Nismo 370z PW Rep Power: 5	The test pipes have extensions for the 02 sensors, its not the test pipes.. Did you see the picture? My knock sensor reads 12k lol, code occurred even when I had cats. Last edited by fuentes2s; 10-11-2022 at 01:01 PM.

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10-11-2022, 01:51 PM	#2 (permalink)
THE BULL Base Member Join Date: Apr 2021 Location: Florida Posts: 216 Drives: G37S Rep Power: 26850	Many times this could be due to an exhaust leak if wiring checks out. Spaced out 02s should work. A vacuum cleaner on blow through the mufflers + some soapy water at your exhaust flanges will point out if there are any exhaust leaks. Lastly a measure of your Fuel trims will point if this is an exhaust issue created by an intake leak.

10-11-2022, 03:12 PM	#3 (permalink)
fuentes2s Base Member Join Date: Nov 2021 Location: Los Angeles Posts: 12 Drives: 2012 Nismo 370z PW Rep Power: 5	Fuel Trims b1 and b2 are in the picture. The percentage between them is way off, what should they be at? One says 118% and the other 98%.