Skip the auto shop - Our mechanics make house calls

Q: check engine light on, code reading P0740, what part do i need

asked by on

check engine light on, code reading P0740, what part do i need Wat do i need to do

My car has 195000 miles.
My car has an automatic transmission.

A: This is related to the transmission control...

This is related to the transmission control lock up system. This can be caused by one or more of the following:

  • Low transmission fluid level
  • Dirty transmission fluid
  • Faulty torque converter clutch solenoid valve
  • Torque converter clutch solenoid valve harness is open or shorted
  • Torque converter clutch solenoid valve circuit poor electrical connection

If you'd like, a certified YourMechanic technician can come to your home or place of business in order to perform a check engine light is on inspection on your vehicle and diagnose this issue.

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: VDC and Slip Lights come on

The VDC and Slip Light illumination could be an indication that you are getting low on brake fluid, due to worn brake pads. Low brake fluid could cause the throttle control to kick in when a sudden vehicle movement is...

Q: Screw broke on manifold

Hello. It is possible that the broken screw could be extracted and replaced. This however, may or may not be possible. If it is not possible to extract the broken screw you would then need to have the entire manifold...

Q: Strange squeak when engine go over 950 rpm and back

The most likely cause of the noise you are hearing are the plastic guides on the timing chain tensioner going bad. The repair would be to replace the timing chain with all guides and a new tensioner along with the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...