![Upstream” or “downstream” O2 sensor? Got this reading, and I was told by the gentleman at Oreilly that he doesn't know if it is an upstream or downstream O2 sensor. Anybody by Upstream” or “downstream” O2 sensor? Got this reading, and I was told by the gentleman at Oreilly that he doesn't know if it is an upstream or downstream O2 sensor. Anybody by](https://preview.redd.it/upstream-or-downstream-o2-sensor-got-this-reading-and-i-was-v0-1ncpcuktzrz91.jpg?width=640&crop=smart&auto=webp&s=42a59946610806cb9afac61f9719e4837c150b92)
Upstream” or “downstream” O2 sensor? Got this reading, and I was told by the gentleman at Oreilly that he doesn't know if it is an upstream or downstream O2 sensor. Anybody by
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![How to access these codes? O2S & HTR are flashing but I can't access any information about them? : r/MechanicAdvice How to access these codes? O2S & HTR are flashing but I can't access any information about them? : r/MechanicAdvice](https://preview.redd.it/how-to-access-these-codes-o2s-htr-are-flashing-but-i-cant-v0-p0450pl3ty891.jpg?width=640&crop=smart&auto=webp&s=890b8e833f2f4ff24d8eb73cf8b580076c3bec24)