OXY SEN Fuse keeps blowing....

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Jan 14, 2024 | 02:06 PM

Rockitansky775

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From: Atlanta

OXY SEN Fuse keeps blowing....

Hi all, I have a 2002 track car that keeps blowing the OXY SEN 15amp fuse whenever I turn the key to start. I have long tube headers and have only the upstream flat 4 O2 sensors. The car will run fine but as I scan using HP tuners scanner, the bank 2 sensor 1, reading are fine at cold start up then go low volts after it heats up. Bank 1 sensor 1 reads good at around .440 volts but pax side goes anywhere from .200 to .900.

Any suggestions as to where I should start with chasing down this probable short? THX!

Last edited by Rockitansky775; Jan 14, 2024 at 02:24 PM.

Jan 14, 2024 | 02:07 PM

Rockitansky775

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From: Atlanta

The bank 2 volts vary wildly whenever I give it gas, but then seems to settle back to normal at idle....

Jan 15, 2024 | 07:30 PM

Rockitansky775

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Disregard, just found out bank 1 sensor 1 was the cause of the 15amp fuse blowing. I guess it really doesnt matter which side as it still blows the same fuse.

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