Code p0740

Torque Converter Clutch Circuit Malfunction. This diagnostic trouble code (DTC) is a generic OBD-II powertrain code. When is the code detected?

You would need a factory wiring diagram of your car to locate the right connections points between the circuit and notice for damage with the wiring.

It is a generic trouble code to all makes and models of vehicles made. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. This solenoid has the little screen clogged with a little pieces of gasket of transmission filter. First thing - is the transmission contaminated with water at all? Did you already perform a full fluid exchange service?

That is what I would do first. In that sense, if you can see that the code is present and at the same time the MIL is illuminate then at least one transmission code has been set in the memory of TCM. If you remove it and it is full of debris, you might try replacing it. The torque converter solenoid is on the top of the transmission. If there is nothing on the solenoi there is.

Unfortunately, this code is usually indicative of a costly problem. The PCM has detected an abnormality in the torque converter clutch circuit. The computer controlled automatic transmission uses varying degrees of torque converter clutch application (also called torque converter lock up) to maximize engine power and optimize fuel efficiency.

With this code , you would not likely notice any drivability issues. Average repair cost is $4at 115miles. It has something to do with the torque converter solenoid. My transmission shifts fine!

Turn ignition off and clear codes. Road test vehicle at over MPH for more than one minute. Lock-up piston operation will then be controlled. It reads tcc out of range. However today I was on the highway when.

The problem is about an electrical situation, right now. Basically it means the TCM has asked the ECM to turn on the check engine light. One of the most common codes too. Cleared it and never see the code in daily driving but the slight downshift persists. Another member justed mailed me that he was going to have a tech drive with him with the computer connected to see how the solenoids were working.

Got the transmission over heated message on the dash as well as the check engine light. This time there was a noticeable noise. It was loud and came in short burst when accelerating and sounded like a squeeling V-Belt on an engine.

I removed the fuse for the cruise control while the ignition key was in the ON position just to see if it was blown. I replaced solenoids one being the torque converter govner and the other bein torque converter preasure. It could eventually be that a valve is sticking or its control spring broken, which could interfer in the torque converter clutch operation. I just finished replacing the catalytic converter and the two Ox sensors on the downstream side of the cat in our Sentra with 1. This could be a sensor on the transmission or it could be something more serious.

I cleared the code and checked the flui a quick drive brings the code back. Then, dropped the pan and replaced the filter (it looked original!), also pulled the valve body cover and replaced the TCC solenoid. Instea follow the repair procedure shown below.

Car is still running fine with no significant changes except for check engine light. Is this the only way to resolve this problem? It drives like it suppose to.

I was told to change the fluid and filter in the transmission and that would fix this. It would take a while to shift from 3rd to 4th. Thanks in advance for any help! The code is common in BMW vehicles experiencing transmission troubles. I got this code after the transmission started slipping and not shifting properly.

I had replaced the TCC about a year and a half ago for $6due to the appearance of this same code. The light popped back on the other day and my factory power train warranty is a couple months from being over.

After refilling fluid (by the dealer the last time), the code would come back after 1miles or so. The potential fix from Porsche was a new tansmission, around $7K. It only goes on when I accelerate on the freeway. Fortunately this is a code that the retail auto parts stores don’t immediately try selling parts to the potential customer. I drove with the clunk, then loss of power, worse gas mileage, then surging at take off, for 38k miles before the transmission gave a code so they could find the problem.

The 7code … means that this computer is detecting a malfunction somewhere in the system. The 7is referring to the output speed sensor. These transmissions have a speed sensor controlling input and one for output.