Skip the auto shop - Our mechanics make house calls

Q: Car is throwing trouble code P0746 and it is a solenoid valve problem.

asked by on

When I try to accelerate, normally uphill, it skips some gears and RPM's get up high but the vehicle doesn't speed up

My car has 120000 miles.
My car has an automatic transmission.

A: This code relates to the pressure control s...

This code relates to the pressure control solenoid that regulates the pressure of the transmission fluid flowing in and out of the valve body inside the transmission. Generally, this is usually related to some kind of foreign material that gets stuck and inhibits the mechanical function of the solenoid.

This can also happen when the transmission fluid is excessively dirty, when fluid is low, or when there is a poor electrical connection to the solenoid. I would recommend having an expert mechanic, such as one from YourMechanic, come to your location to diagnose what is wrong with your transmission or its fluid and replace the transmission oil pressure switch if needed.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Had a computer check done and the scanner said to replace the Oxygen sensor.

Hi there. The oxygen (O2) sensors have two functions, read the emissions and preheat the tip for measuring. Usually the tip will no longer preheat up causing the sensors to not register the emissions. Other times the O2 sensors tend...

Q: I would like to know why my rear end shakes really bad at 55 mph

Hello, thank you for writing in. The vehicle is likely having an issue with the tires or suspension. Typically you start by testing the simpler possibilities and work your way to the more complicated fixes. With that said, one of...

Q: Mystery lurch

Check the quality of the transmission fluid if there is an inspection dipstick. If the fluid level is low or the fluid is very dark, this may be a sign of a problem. Next, the ignition system must be in...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...