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26/03/2022 3:32 pm
Topic starter
Afternoon Scotty,
follow you on you tube . I have a 2002 highlander 4 cylinder. It currently has 158000 miles. Code P0171 came on. I changed mas sensor and upstream sensor but the light still on.
2 Answers
2
26/03/2022 4:45 pm
It may be something as simple a malfunctioning PCV valve or a more involved intake manifold gasket leak.
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27/03/2022 4:47 pm
