The Lemon IndexThe torque converter lockup solenoid has an electrical fault. Full P0740 page
19 owner complaints · the #1 code Honda Civic owners name · 19% of Honda Civic complaints that name a code (every car: 0.8%)
Middle of 85,000 miles · most between 66,000 and 110,000 (19 owners gave it)
Honda Civic owners named P0740 in 19 complaints to the U.S. government (NHTSA), most often on the 2001 model year, at a middle of 85,000 miles. The part they name most is the torque converter (8 complaints). Complaints are owner reports, not proof of a defect.
Honda Civic model years that report P0740
- 200119
Owner complaints naming P0740, by model year. Raw counts: years that sold more get more complaints, so this is each model year's record, not a failure rate.
Mileage when it happened
85,000 miles is the middle of what 19 owners entered. Half were between 66,000 and 110,000 miles.
The mileage on the complaint form, when the owner gave one.
What owners say caused it or fixed it
The most-named part is the torque converter, in 8 of the 19 complaints (42%). 5 of those mention it being replaced or repaired, and 1 say the problem came back afterwards. Next: transmission (replaced or rebuilt) (7).
- Torque converter8 complaints5 mention a repair or replacement, 1 of them says the problem came back · what owners paid
- Transmission replaced or rebuilt7 complaints7 mention a repair or replacement, 2 of them say the problem came back · what Honda Civic owners paid
Counted from the owners' own words: a part counts when a sentence names it with a cause or repair word. What owners wrote, not a diagnosis. A shop should confirm the cause before replacing parts.
Symptoms owners describe with P0740
79% of these complaints say the check engine light came on.
Codes owners report with it
P0730 2
Other codes named in the same Honda Civic complaints, and in how many.
Repair costs
- Transmission replacement$3,1004 bills · middle bill
Repair bills owners named in these 19 complaints (4 in all). Owner reports, not a quote: costs vary by shop and region.
Keep going
- P0740: meaning, causes and every car that reports it
- Honda Civic reliability by year
- 2001 Honda Civic problems and recalls
P0740 on other cars
Honda Odyssey (41)
The details
How we count
We read every owner complaint in the NHTSA file whose text names this trouble code, and count the ones filed about this model (matched by the make, model and model year on the complaint). Mileage is what the owner entered on the form.
Parts: a complaint counts for a part when one of the owner's own sentences names that part together with a cause word (failed, bad, diagnosed, caused by, leaking ...) or a repair word (replaced, repaired, new, reprogrammed ...). "Came back" means the same complaint also says the problem returned or the repair didn't fix it. These are counts of what owners wrote, not a diagnosis, and one complaint can name several parts.
Complaints are reports, not proof of a defect, and most owners never file one. Popular models get more complaints, so the counts are not a failure rate. The code meaning is the standard SAE J2012 definition in our own words, or the carmaker's meaning where we verified it for that make.
What P0740 means
The torque converter lockup solenoid has an electrical fault. Fuel economy drops and the car may shudder.
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
- Wiring fault
Check the complaints yourself
NHTSA complaint numbers (search them at nhtsa.gov): 10908202, 10616819, 10584320, 10575659, 10408841, 10362689, 10348890, 10346030, 10342892, 10330047, 10279251, 10268219 and 7 more.
Quick answers
What does P0740 mean on a Honda Civic?
Torque Converter Clutch Solenoid Circuit/Open. The torque converter lockup solenoid has an electrical fault. Fuel economy drops and the car may shudder.
Which Honda Civic years have the most P0740 complaints?
In complaints to NHTSA, owners of the 2001 (19) Honda Civic named P0740 most (19 complaints in all, 2001–2001). Raw counts, not a failure rate.
What fixes P0740 on a Honda Civic?
Owners most often name the torque converter (8 of 19 complaints), then transmission (replaced or rebuilt). That's what owners wrote, not a diagnosis: have a shop confirm the cause with a scan and tests before replacing parts.
At what mileage does P0740 show up on a Honda Civic?
Owners who gave their mileage reported a middle of 85,000 miles; half were between 66,000 and 110,000 (19 owners).
Can I drive my Honda Civic 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.
Sources: NHTSA owner complaints that name P0740 on the Honda Civic, counted by The Lemon Index; NHTSA recalls; repair bills owners named. Meanings: SAE J2012 in our own words. Owner reports, not a diagnosis or repair advice for your car.