The 2019 Honda CR-V triggering P0740 indicates a malfunction in the torque converter clutch (TCC) solenoid circuit. This compact SUV's CVT transmission uses the TCC for efficiency, and solenoid issues affect operation.
Understanding P0740
P0740 sets when the transmission control module detects an electrical or performance problem with the TCC solenoid. The solenoid controls lockup clutch engagement for fuel efficiency during cruising.
CR-V CVT Transmission
The 2019 CR-V uses a continuously variable transmission (CVT). Unlike traditional automatics, CVTs use a belt-and-pulley system. The torque converter still provides the initial drive connection and includes a lockup clutch for efficiency.
TCC Solenoid Function
The TCC solenoid opens and closes to control hydraulic fluid flow to the torque converter clutch. When engaged, the clutch locks the converter, eliminating slip for better fuel economy during steady-state driving.
Common Causes
Solenoid electrical failure. Dirty transmission fluid clogging solenoid. Wiring issues between TCM and solenoid. Internal transmission problems affecting solenoid performance.
Transmission Fluid Importance
Contaminated or low fluid affects solenoid operation. Honda CVTs are sensitive to fluid condition. Inspect fluid level and quality. Use only Honda-approved CVT fluid.
Repair Costs
Transmission fluid service costs $150-300. TCC solenoid replacement runs $400-800 (typically requires transmission pan removal). Complete transmission service or replacement exceeds $3,000.