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Discussion Starter · #1 · (Edited)
Just bought a 07 ecplise gs. Needed the motor but playin with transmissions to see if I can fix it. Throws a P0734 on gear 4. CATS and O2 SENSORS ARE GONE. Not sure if it’s related. Could this code be from a sensor? ECM and Tcm not communicating? I’m gunna try to repair transmissions if not I’m takin the motor. Has anyone ever dealt with this code before?
 
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