Q: My car won't shift up right away when accelerating hard

asked by on

My car won't gear up when hitting the highway. I accelerate but will stay around 40-50 mph. When this happens an intermediate check engine light appears. I can slow down and the car will jump into the next gear and the check engine light will turn off. I drive a 2004 Grand Prix.

My car has 123000 miles.
My car has an automatic transmission.

To determine the exact cause of this issue, I would recommend having your trouble codes scanned by a qualified professional. If the check engine light is on, a code will be stored in your vehicle that can give an indication what might be wrong with the transmission.

Was this answer helpful?

Hi DJ. Thanks for contacting us today. There are a few possible reasons why your car is having this issue. First, a faulty shift solenoid will cause this to happen, as will an obstruction of debris in the transmission hydraulic lines, an inner seal failure or a worn or faulty torque converter. The intermittent check engine light could mean that this issue is due to a faulty sensor or electrical component within the transmission. This is something that is best diagnosed by a transmission specialist, so you should probably contact a local transmission shop to see what they can do to help in this case.

Was this answer helpful?
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 won't shift up right away when accelerating hard

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: My car loses power then won't go over 20 mph its a 05 pontonic grand prix

Hi April. The Reduced Power light usually indicates a fairly serious problem with the throttle system. When this light illuminates the vehicle will often go into a “safe mode”, which will severely limit the speed of the car and in...

Q: Where does the vent line from front of the gas tank go?

Hi, thanks for writing in. The vent line or EVAP tube the comes from the gas tank is typically routed to the intake manifold. The intake manifold is where the air is mixed with the fuel before it reaches the...

Q: Rpm jumping while driving after changing air filter

You may have a vacuum line off. Removing the air filter on many cars involves disconnecting and reconnecting some hoses, or at the very least pushing some out of the way. I would revisit the air filter and make sure...

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...
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...