Fault Family System: Powertrain (P-Codes) 16 SAE Codes

Torque Converter Clutch Circuit

Diagnostic & Technical Explanation

Code P0740 (Torque Converter Clutch Circuit/Open) sets when the TCM detects an open circuit, out-of-range current, or a stuck-on/stuck-off performance fault while driving the torque converter clutch solenoid that locks the converter for fuel economy at cruise. Causes are a failed TCC solenoid, contaminated fluid causing the solenoid or clutch plate to stick, or damaged control wiring.

These 16 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 16 times.

Codes in this family (16)

Code	Definition	Repair coverage
P0740	Torque Converter Clutch Circuit/Open	4 ranked fixes
P0741	Torque Converter Clutch Circuit Performance/Stuck Off	4 ranked fixes
P0742	Torque Converter Clutch Circuit Stuck On	4 ranked fixes
P0743	Torque Converter Clutch Circuit Electrical	4 ranked fixes
P0744	Torque Converter Clutch Circuit Intermittent	4 ranked fixes
P2756	Torque Converter Clutch Pressure Control Solenoid	4 ranked fixes
P2757	Torque Converter Clutch Pressure Control Solenoid Control Circuit Performance/Stuck Off	4 ranked fixes
P2758	Torque Converter Clutch Pressure Control Solenoid Control Circuit Stuck On	4 ranked fixes
P2759	Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical	4 ranked fixes
P2760	Torque Converter Clutch Pressure Control Solenoid Control Circuit Intermittent	4 ranked fixes
P2761	Torque Converter Clutch Pressure Control Solenoid Control Circuit/Open	4 ranked fixes
P2762	Torque Converter Clutch Pressure Control Solenoid Control Circuit Range/Performance	4 ranked fixes
P2763	Torque Converter Clutch Pressure Control Solenoid Control Circuit High	4 ranked fixes
P2764	Torque Converter Clutch Pressure Control Solenoid Control Circuit Low	4 ranked fixes
P2769	Torque Converter Clutch Circuit Low	4 ranked fixes
P2770	Torque Converter Clutch Circuit High	4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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