Q: my car dont shift in high gears, but the transmission is good.

asked by on

I put my car on a machine and I needed a throttle sensor. I put a new one on. About a week ago my car's rpms went up high and it didn't want to shift into third and fourth gear. My transmission is good. My question: is it the transmission speed sensor???
My car has 160000 miles.
My car has an automatic transmission.

Hello. There are quite a few different parts that can cause this. It can be a transmission speed sensor, but a bad or defective throttle sensor can also cause this. If this started right after the throttle sensor was replaced, then you need to check and see if it is mounted and adjusted right. I typically use a computer scan tool to monitor the sensor reading, while pressing on the accelerator pedal to see if the sensor is reading correctly. If it is, then that is not the issue. From that point, I would need to check the output of the vehicle speed sensor, and check the transmission module for codes. That may show something different, such as a problem with a shift solenoid. It can also be caused by a voltage issue, or a blown fuse for the transmission supply voltage. My main concern would be if this occurred right after the throttle sensor was replaced. If this is something that you were looking to have checked, have a certified mechanic come to you to diagnose the issue of your car not shifting in high gears.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. my car dont shift in high gears, but the transmission is good.

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: put in new radiator and now tranny hose line bubbles up where connected to the new radiator

When the transmission line was reinstalled you cut into the inner lining of the hose and caused the fluid to get under the inner liner. You have to replace the line now or it will burst and cause loss of...

Q: I replaced the IAC and EGRVCS - the idle eventually worsens and dies

Hi there. You will need to check the mass air flow (MAF) sensor for if it is plugged in and dirty. If there is nothing wrong with the MAF, I recommend replacing it for the symptoms that you are encountering...

Q: Hi I had a misfire in cylinder 2 today. I had replaced the ignition coil and spark plugs of the front 3 cylinders after the plugs

If the car sat for a year with fuel in the gas tank, that fuel has oxidized and created gum, varnish and other solid contaminants that have plugged up the fuel filter and the fuel injectors. The fuel filter is...

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...
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 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...