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P0157 on Toyota Sienna

Model: Toyota Sienna Fault Code: P0157 Posted: 2013-07-10 09:08

P0157 code on an otherwise well running 2011 Toyota Sienna w/ 76K; replaced rear O2 sensor and erased the code. after one week and a tank of gas the code has returned. I replace the original sensor w/ an aftermarket sensor form Autozone. Question: could the forward sensor be causing an issue w/ the post catalytic converter sensor? any insights? thanks for your attention.

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P0157

Comments (3)

Anonymous 2013-07-11 08:17

Upstream sensor will not affect the downstream one. Get a downstream sensor from the Dealer...more $$$ but likely worth it.

Anonymous 2013-07-11 09:44

Thanks for the insight....

Anonymous 2013-07-14 09:26

maybe a wiring issue....before I would invest more money and find out it was a wiring problem I would do some voltage checks.