Skip the auto shop - Our mechanics make house calls

Q: Locked solenoid valve

asked by on

My engine light is on. It was diagnosed as code P1740 - a locked solenoid valve.

A: The code is for the lock up control solenoi...

The code is for the lock up control solenoid circuit of the transmission or transmission module. The first test indicated for the code is to clear the code and see if it returns. If it does not return, then it is intermittent and should be ignored. If the code returns then a diagnostic check will need to be done to see if the module, wiring, or transmission solenoid is the cause. Other owners mostly just cleared the code and it did not come back. If you would like this inspected, a certified mechanic, such as one from YourMechanic, can come to your home or office to clear your Engine Light and let you know what needs to be done.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Timing belt or chain in my Nissan?

Hi there, thanks for your question. This model has a cam driven timing chain, so you should not need to worry about changing the belt at certain intervals. Just be sure to have regular oil changes performed.

Q: Drained the wrong fluid

Hello! Believe it or not, that has been done several times before on Subarus. The transmission drain looks very similar to the oil drain, so they can easily be mistaken for one another. Usually, the transmission will just have to...

Q: Car does not accelerate

These vehicles are very sensitive to someone driving with both feet, meaning if you are touching the brake at the same time pushing down the gas pedal, the computer will go into a low power/no throttle mode since it sees...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...