The plug half came off of the sensor side of the oxygen sensor connector (don't ask me how.) and the wire colors are not the same on both sides. The chassis side wire colors match the wiring diagram: BW, YR, W.. On the universal sensor, the blue wire is signal and white is ground. Subaru's wiring diagrams confuse me, so I'm not 100% sure which of the red and whites is signal/ground.

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Subaru Oxygen Sensor Wiring Diagram
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I have spliced in a new oxygen sensor and it isn't working properly. Anyone know what the color codes are? The sensor I purchased has the same colors as the OE one, but it throws a CEL saying no power to the oxygen sensor. Any suggestions? This is on my '04 FXT. Thanks.. Anyone have the wiring pin out for the front O2 sensor for a 2003 SOHC 2.5 Legacy Outback. Red Y/R White Yellow That is the wires I have looking at the front of the plug but all of the wires were pulled out when I go the car. Thanks

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