Question about 2000 Toyota Avalon

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Check engine light on;engine codes p0420 and p0773

2000 avalon xls;150k mi.;codes pulled by auto zone;only notable performance difference is lower gas milage.

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I looked up the codes you posted.
P0420 is showing a bad oxygen sensor on bank #1, the one down by the catalytic converter.
P0773 is an electrical problem with the shift solenoid E.
A bad oxygen sensor would cause lower fuel milage.

Posted on Mar 11, 2009

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