The Lemon IndexThe torque converter lockup solenoid has an electrical fault.
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
Failed TCC solenoid. Then: wiring fault.
Owners named P0740 in 122 complaints to the U.S. government, most often on the Honda Odyssey.
Models that report it most
Complaints that name P0740, by model. Raw counts, not a failure rate: popular models get more complaints. Tap a model for its years, mileage and what owners say fixed it.
P0740 by model: P0740 Honda Odyssey (41) · P0740 Honda Civic (19)
Years owners report it on most: 2001 Honda Civic · 2003 Honda Odyssey · 2001 Honda Odyssey · 2002 Honda Odyssey · 2000 Honda Odyssey · 2004 Honda Odyssey
Transmission problems by year: Honda Odyssey · Honda Civic · Honda Accord · Honda Pilot · Dodge Grand Caravan · Toyota Highlander
The details
What P0740 means
The torque converter lockup solenoid has an electrical fault. Fuel economy drops and the car may shudder.
Can I drive with P0740?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
20% of the owner complaints that name P0740 also say the car transmission slips or shifts hard. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P0740
- Failed TCC solenoid
- Wiring fault
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Transmission slips or shifts hard: 20% of complaints
- Loses power or goes into limp mode: 12% of complaints
- Stalls or shuts off: 6% of complaints
- Warning lights and electrical faults: 4% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report P0740 most
2001 Honda Civic (19), 2003 Honda Odyssey (12), 2001 Honda Odyssey (8), 2002 Honda Odyssey (7), 2000 Honda Odyssey (7), 2004 Honda Odyssey (7).
Related codes
P0741 P0742 P0744 P0745 P0746 P0747 P0736 P0735
Quick answers
What does P0740 mean?
Torque Converter Clutch Solenoid Circuit/Open. The torque converter lockup solenoid has an electrical fault. Fuel economy drops and the car may shudder.
Can I drive with P0740?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
What causes P0740?
Failed TCC solenoid; Wiring fault.
Counts: NHTSA owner complaints whose text names P0740. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.