Skip the auto shop - Our mechanics make house calls

Q: Transmission

asked by on

When i put my car in drive i can only get over 15 mph then when i put it in 3rd i can only get to 40 mph what do that mean
My car has an automatic transmission.

You are having a computer sensor failure that is causing the engine control module (ECM) to go into failure management mode which limits the throttle opening. This will happen until the problem is fixed. You will need to have the ECM scanned to check for and diagnose any codes in computer memory. If you need help with this, a technician from YourMechanic can inspect your acceleration and transmission issue and recommend the appropriate repairs to have this fixed.

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: Having a problem with Anti Lock Brake System and/or Traction Control

The most likely cause of this issue would be a wheel/vehicle speed sensor or an ABS control module. The wheel speed sensors are what sends the data of what the wheels are doing, and the ABS module receives and...

Q: 05 Nissan Frontier has a code of p1283 and p0420. Why are these codes stored?

Hi there. The code p0420 is present for the O2 sensor behind the catalytic converter has detected the air fuel ratio is not within the limits. The code p1283 is present for the air fuel ratio sensor is registering a...

Q: Transmission is leaking 2003 Ford Crown Victoria

Transmissions are very "year and model specific" due to year-to-year variances in electronic controls/PCM interface. In your case, it might not matter though. That is, if the leaks you are referring to are external leaks (e.g. from the transmission oil...

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 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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.