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: Stalls when hit gas

This sounds like it could possibly be a fuel-related problem for your 1991 Nissan Pickup. I would want to know what the fuel pressure is by testing with a gauge. I also recommend doing a compression test to verify good...

Q: Scraping noise shifting gears

Hello there, thank you for asking about your 2013 BMW 135i. The symptoms you are describing can be caused by both transmission and clutch pedal issues. If the synchronizer rings inside of the transmission wear out, it can cause the...

Q: Tires are vibrating

The tires would need to checked to see if any damage to the tires is found and if the tires are properly balanced. If you added any tire sealer to a tire to try and seal a leak, then the...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...