P1860 BUICK TCC PWM Solenoid Circuit Electrical
Possible causes – Faulty Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid– Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid harness is open or shorted– Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid circuit poor electrical connection