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I'm having the exact same issue. I replaced all 4 sensors, (Aftermarket), after activating and doing relearn, all sensors show good ID, Pressure and communication. No codes until I drive the car for 10 minutes. then I get C2121 thru C2124, Transmitter no data. Reset codes and same thing 10 minutes later even though TPMS status shows good.
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2020 Forester
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Discussion Starter · #22 ·
Update: I put my OEM wheels back on and TPMS worked within 5 minutes. Must still have software issue where OBD relearn in not happening.
 
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