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Long term fuel trim

Fairtax4me
in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX

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So I hooked up a scanner to my wagon to check fuel trims today.

Stft at idle and at 2500 rpm (sitting still) hovers around 0, but varies from about -1.5 to 1.5.

Ltft at idle sits at a steady 4.6%. At 2500 rpm it jumps up to around 8.6 - 10.1%.

Seems kinda high to me. Sound like the O2 sensor is fouled?

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