03 Safari P0141 Help. Which 02 sensor is this???

03 Safari P0141 Help. Which 02 sensor is this???

Postby TQVanGuy [OP] » November 23rd 2020, 7:34pm

Hi all. Ted here. I have a '03 Safari and recently got a P0141 code. I tested the fuse for the o2 sensor and it seems to have continuity. I've been really turned around from the information I'm finding online as to which o2 sensor this is referring to. I recently purchased a downstream o2 sensor and am hoping I can get some help as to if this is the right one and where exactly it is located for me to replace. I'm starting to think it's only one downstream and 2 upstream and perhaps I need a bank 1 upstream instead. Anyways, if anyone has any insight I'd love to hear. Thanks!

Ted
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Re: 03 Safari P0141 Help. Which 02 sensor is this???

Postby Leeann_93 » November 23rd 2020, 11:37pm

There is only 1 downstream sensor, and it doesn't do much. That code is for the heater circuit; check the wiring to the sensor first.
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Re: 03 Safari P0141 Help. Which 02 sensor is this???

Postby AstroWill » November 24th 2020, 1:49am

Welcome to the site!

x2, the only thing the downstream sensor does is let the computer know if the CAT is functioning properly.

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Re: 03 Safari P0141 Help. Which 02 sensor is this???

Postby TQVanGuy [OP] » November 25th 2020, 1:26am

Awesome! Thanks for all the information. I swapped the downstream sensor today. Hopefully that will do whatever it is I'm looking for. To clarify though, that particular code is referring to that single downstream sensor, correct? Seems like that's what B1S2 would be I imagine if that is in fact what that code is pointing to.
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Re: 03 Safari P0141 Help. Which 02 sensor is this???

Postby AstroWill » November 26th 2020, 1:16am

It all depends on what your system has.
Bank 1 is always on the side that has the #1 cylinder. Sensor 1 would be the closest to the front of the engine on that side, sensor 2 would be the next down stream, sensor 3 would be the one after that.

Bank 2 would be the opposite side, sensor 1 would be the one closest to the front of the engine on that side, sensor 2 would be the next downstream etc.

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