Cadillac DeVille torque control solenoid issue causing check engine light and inspection failure on Cadillac DeVille

Some Cadillac DeVille owners report experiencing issues with torque control solenoids that trigger the check engine light, leading to inspection failures. This problem can stem from a malfunctioning torque converter clutch solenoid, which is known to illuminate warning lights and affect vehicle performance. Many owners discuss concerns related to the common fault code P1860 in forums and technical resources. Additionally, the torque converter's role in connecting the engine to the transmission makes its proper function critical for overall vehicle operation. To effectively diagnose the issue causing the check engine light, some owners recommend using an OBD scanner to read diagnostic trouble codes and identify the specific problem. Addressing these torque control solenoid issues is essential for resolving warning lights and ensuring successful vehicle inspections.