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Old 08-16-2018, 09:09 AM   #3
DrewP
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Join Date: Dec 2006
Location: Los Angeles, CA
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P1141 is for the rear O2 sensor, bank 1 sensor 2 (you're correct, #1 us upstream closest to the manifold, #2 is downstream of the catalyst.)

Some generic scanners don't correctly translate manufacturer codes like the P1141. It's actually for the heater circuit for the downstream O2 sensor.

If you still get the code after swapping the sensor, check that there is switched +12vdc (it might be +5vdc, I don't remember for certain but I'm pretty sure it gets 12v) across the white wires at the O2 sensor connector, those are for the heater. You should also see some resistance across the white wires on the disconnected sensor. If it's open or up in the mega-ohm range the heater in the sensor is likely bad.
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