Torque Converter Clutch Circuit Malfunction
2014-2014 Lincoln MKX 3.7L V6
The 2014 Lincoln MKX is equipped with a 3.7L V6 engine. Below you'll find detailed p0740 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
Malfunction in the torque converter clutch (TCC) solenoid circuit.
Symptoms
- Check Engine Light
- No lockup feel (higher RPM at highway)
- Poor fuel economy
- Transmission overheating
Common Causes
- Faulty TCC solenoid
- Wiring issue
- PCM driver failure
- Torque converter failure
Diagnostic Steps
- Test TCC solenoid resistance
- Check wiring
- Command TCC engagement with scan tool
- Monitor RPM drop during lockup command
Repair Notes
Replace TCC solenoid or repair wiring. Solenoid is often inside transmission.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
P0740 on Other Vehicles
Lincoln Aviator
2003-2003 4.6L V8 DOHC
Lincoln Aviator
2004-2004 4.6L V8 DOHC
Lincoln Aviator
2005-2005 4.6L V8 DOHC
Lincoln Aviator
2020-2020 3.0L Twin-Turbo V6
Lincoln Aviator
2020-2020 3.0L V6 Twin Turbo
Lincoln Aviator
2020-2020 3.0L V6 Twin Turbo Hybrid
Lincoln Aviator
2021-2021 3.0L Twin-Turbo V6
Lincoln Aviator
2021-2021 3.0L V6 Twin Turbo
Common Questions
What does code P0740 mean on a 2014-2014 Lincoln MKX?
P0740 stands for "Torque Converter Clutch Circuit Malfunction". Malfunction in the torque converter clutch (TCC) solenoid circuit.
What are the symptoms of P0740 on a Lincoln MKX?
Common symptoms of P0740 include: Check Engine Light, No lockup feel (higher RPM at highway), Poor fuel economy, Transmission overheating.
What causes P0740 on a 2014-2014 Lincoln MKX?
Common causes of P0740 include: Faulty TCC solenoid, Wiring issue, PCM driver failure, Torque converter failure.
Last updated: March 2026