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mr220v yesterday you said that an O2 sensor wouldn't give a CEL but now you say that 21 and 25 are O2 related so who's right? Seems to me that as I said yesterday , that it could be a bad O2 sensor. My old toyota truck showed CEL when the O2 was bad , once I replaced it and reset the code everything went back to normal including my fuel consumption and occasional rich smell from exhaust.
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