TCC Always Engaged

Check engine idle speed. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. Check torque converter clutch operation. See TORQUE CONVERTOR ENGAGEMENT TEST  under SELF-DIAGNOSTIC SYSTEM. Retrieve and record DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM. Perform TEST A: SHIFT & TCC SOLENOIDS  and TEST B: TFT SENSOR  under DIAGNOSTIC TESTS. Repair as necessary. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  . Perform TRANSMISSION DRIVE CYCLE TEST  under SELF-DIAGNOSTIC SYSTEM. Repeat QUICK TEST. Ensure DTCs are not present.