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Jerry Newton
Jerry Newton, Cadillac Technician
Category: Cadillac
Satisfied Customers: 4508
Experience:  ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
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2001 Cadillac DeVille DTC P1860 is TCC PWM solenoid circuit

Resolved Question:

2001 Cadillac DeVille DTC P1860 is TCC PWM solenoid circuit electrical. What does TCC PWM stand for and how do I fix it?
Submitted: 7 years ago.
Category: Cadillac
Expert:  Jerry Newton replied 7 years ago.
P1860 tells you that the TCC PWM solenoid is electrically faulty. The acronym stands for Torque Converter Clutch Pulse Width Modulation. It's a fancy name for the solenoid that controls the torque converter clutch. It's a common failure item; unfortunately, you probably won't be able to replace it. It is under the side cover of the transaxle, and you either have to remove the transaxle or be very creative in order to replace it with the transaxle in the vehicle. Labor time to replace it is in the order of 8-10 hours.
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