Initial codes are P0740. Was told it is the torque converter solenoid switch and that I need a new transmission. Vehicle drives smoothly but the tcs and check engine light comes on at the same time. This usually happens when travelling at about 60 mph or more. Vehicle uses a lot of gas
SOURCE: 2001 HONDA ACCORD CODE P0740 TRANSMISSION
Horsecrap...go to an independent transmission dealer after you call the extended warranty folks and complain!
I can count the number of Honda transmissions that go bad before 300,000 miles on one hand.
Good Luck
SOURCE: honda torque converter clutch solenoid circuit
P0740 is a Torque Converter Clutch Circuit Malfunction, you will need to have just this circuit tested, it is mostly just a defective Torque converter clutch solenoid in the trans or a defective connection to the trans, u do not need another overhaul.
SOURCE: check engine reads P0740 honda civic
I am sorry to bum you guys out, but this usually means the piston in the torque converter is bad. The converter needs to be replaced along with a transmission flush.
SOURCE: tcs light and engine check light on my 2000 honda odyssey
I had the same code/symptoms a few weeks ago. Dealer did a nice job checking through all the details. Replaced the egr too, but no improvement. Finally found one cylinder not firing correctly (not the same pressure as the other cylinders.) Dealer did a value clean/adjustment, for about $250, and the problem has been gone for about a month now. We are also getting about 15% better mileage.
Hope this helps.
SOURCE: I have a 20001 Odyssey with 70,000. The check
unfortunately it is. Contact your local dealership to see if it may still be covered under a warranty or not.
Customer Concern:
The check engine light is on with the trouble code P0740 present.
Tests/Procedures:
1. Test drive the vehicle and watch the tachometer. See if the automatic transmission locks up. If unable to see the RPM change, and the Engine Control Module (ECM) is turning on the lockup solenoids, then the problem has to be internal to the transmission. The transmission has an extended warranty from Honda for 7 years or 100,000 miles.
Potential Causes:
Automatic Transmission
Lock-Up Solenoid
Torque Converter
Tech Tips:
TSB #02-062
Diagnostic Codes:
P0740
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