Had a P1860 PWM electrical code and lost torque converter lockup, except for random times. Replaced all solenoids and everything electrical internal, still same problem. Discovered a weak ground on PCM that must have damaged the output transistor / driver, new PCM flashed for my VIN fixed it! | Frank N. Adkins
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Had a P1860 PWM electrical code and lost torque converter lockup, …
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