ShopBaseFree forever shop management software for auto repair shops
Try ShopBase Free →
Home/DTC Codes/Lincoln/MKX/2016-2018 3.7L V6/P1740
P1740

Torque Converter Clutch Inductive Signature Malfunction

2016-2018 Lincoln MKX 3.7L V6

Moderate SeverityPowertrain

Description

The TCC solenoid did not move when the PCM commanded it. This is an information code — there should be a more specific code stored in the Transmission Control Module. The TCC solenoid circuit performance is not as expected.

Symptoms

  • Check Engine Light
  • TCC not engaging
  • Reduced fuel economy on highway
  • Transmission overheating at highway speeds

Common Causes

  • Faulty TCC solenoid
  • Wiring issue to TCC solenoid
  • Low transmission fluid
  • Internal transmission blockage
  • Contaminated transmission fluid

Diagnostic Steps

  1. Check for additional transmission DTCs in TCM
  2. Test TCC solenoid resistance
  3. Inspect TCC solenoid wiring
  4. Check transmission fluid level and condition

Repair Notes

Check for companion DTCs. Replace TCC solenoid if faulty. Service transmission fluid.

Related Codes

P0740Torque Converter Clutch Circuit MalfunctionP1741Torque Converter Clutch Control ErrorP1741Torque Converter Clutch Control ErrorP1741Torque Converter Clutch Control ErrorP1742Torque Converter Clutch Solenoid Failed OnP1742Torque Converter Clutch Solenoid Failed OnP1742Torque Converter Clutch Solenoid Failed OnP1744Torque Converter Clutch System Stuck in Off PositionP1744Torque Converter Clutch Solenoid Mechanical FaultP1744Torque Converter Clutch System Stuck in Off PositionP1744Torque Converter Clutch System Stuck in Off Position

Other Powertrain Codes

P1740 on Other Vehicles

Lincoln Aviator

2003-2005 4.6L V8

Lincoln Aviator

2003-2005 4.6L V8 DOHC

Lincoln Aviator

2020-2024 3.0L Twin-Turbo V6

Lincoln Aviator

2020-2024 3.0L V6 Twin Turbo

Lincoln Aviator Grand Touring

2020-2024 3.0L Twin Turbo V6 PHEV

Lincoln Aviator Grand Touring

2020-2024 3.0L Twin-Turbo V6 Hybrid

Lincoln Aviator Grand Touring

2020-2024 3.0L V6 Twin Turbo Hybrid

Lincoln Blackwood

2002-2002 5.4L V8

Common Questions

What does code P1740 mean on a 2016-2018 Lincoln MKX?

P1740 stands for "Torque Converter Clutch Inductive Signature Malfunction". The TCC solenoid did not move when the PCM commanded it. This is an information code — there should be a more specific code stored in the Transmission Control Module. The TCC solenoid circuit performance is not as expected.

What are the symptoms of P1740 on a Lincoln MKX?

Common symptoms of P1740 include: Check Engine Light, TCC not engaging, Reduced fuel economy on highway, Transmission overheating at highway speeds.

What causes P1740 on a 2016-2018 Lincoln MKX?

Common causes of P1740 include: Faulty TCC solenoid, Wiring issue to TCC solenoid, Low transmission fluid, Internal transmission blockage, Contaminated transmission fluid.

View Labor Times | View Torque Specs | View Fluid Specs