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  1. General Maintenance, Troubleshooting & Accidents.
    Help! My 2020 WRX is showing really low AF learning 1 values. I’m not sure why, all the other values are staying relatively normal and this started out of no where a few days ago. I’m on a stage 1 91 octane tune +big SF. The only mod I’ve done was the Cobb big sf intake and it was about 8 months...
    af learning afr sensor cobb accesport feedback knock
  2. General Maintenance, Troubleshooting & Accidents.
    Hello, My car has been popping a P0031 (Heater Circuit Low) and with a bit over 130000 miles I recognize that the front O2 sensor needs to be replaced. No problem. Of course everytime something dies on my car, I try to upgrade it. So I would like to do a wideband sensor with a gauge, and it...
    afr sensor afr wideband gauge front 02 sensor p0031
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