P0171 | Misfires and smokes. Gen 1 Toyota Highlander 2003
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- Опубліковано 16 жов 2024
- Steve goes through a DIY friendly approach to a check engine light and poor performance. The PCM is reporting a lean condition P0171and is adding as much fuel as it can. All that extra fuel is causing misfires and noxious exhaust.
We test the air/fuel ratio sensor, which was the cause of the problem and replace it.
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