Check engine light code P0741
The transmission oil pan must be removed and the TC solenoid tested, if it works you will need to remove the transmission replace the Torque Converter.
SOURCE: check engine light came on, code was p0741... the
this is most likely true .try disconnecting the battery positive terminal for 1 minute to see if it will reset itself
SOURCE: These codes comes out P0741
Your torque converter is not locking up.
The solution is to have the torque converter replaced and the transmission serviced.
Hopefully, you are still under warranty and can get it repaired it for free.
If not, it can get pretty expensive.
SOURCE: p0741 Torque Converter Clutch Circuit Preformance or Stuck Off
Toyota is aware of this situation. Production changes have ocurred to correct this condition.
Here is what you do: Take your vehicle to your Toyota dealer. Tell them that you have a P-0741 code, and you want them to apply "Toyota Technical Service bulletin TC008-04" to your vehicle. They will perform several tests, and if you vehicle is lower than 5 years old, and less than 60, 000 miles, they will fix it for free. This TSB is covered by the Powertrain Warranty. Additionally, Thay may replace the ECU with an updated unit, and that particular warranty is in effect for 96 months or 80,000 miles.
This will definatly cure your issue.
SOURCE: I HAVE A CONTINUIG PROBLEM WITH THE CHECK ENGINE
It should still be under warrenty call the shop, and if it is not try some lucas transmisson oil if the valve is sticking it will help it otherwise take it to a shop and have them check the oil port for the shifing valve.
SOURCE: P0741 Torque Converter Clutch Circuit Performance
it's either the tcc solenoid inside the valve body not engaging or the converter itself is on it's way out probably due to bad seal.. change that also if you go the converter route..check also the ground to the solenoid and make sure it's getting enough voltage. make sure the fluid is up to date and flushed before all of the above. and remember after solenoid install car wont drive right for a few miles until computer picks up new solenoid or get new transmission installed
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