Skip the auto shop - Our mechanics make house calls

Q: The engine revs when the E-brake is used

asked by on

When I apply the E-brake, my car would stop as it should. However, at that moment the engine would start revving. I had the codes read and none appeared. What should I do?

A: Hello! We will be happy to help. I believe ...

Hello! We will be happy to help. I believe the problem that you are describing is a normal driving pattern. In your particular vehicle Lexus/Toyota implemented a system called Artificial Intelligence Shift Patterning. It is consisted of many sensors which determine when you are braking or when you are going downhill, and when you brake it will downshift to help stop the vehicle.

You can help determine if the AISP is to blame by taking it out of automatic and placing it into S Mode. S Mode will turn off AISP and you will be able to notice a drivability difference. If you drive it and your complaint goes away then you know that; yes, what you are experiencing is normal.

The AISP is very sensitive, if something was wrong with it a code will surely set so I don’t think there’s an issue in that system. If this is not the case and you feel like it’s abnormal, have a certified mechanic diagnose your brake system firsthand. They will be able to fix the problem accordingly once the issue has been pinpointed.

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

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: On cold start it take long time until it cutch 90 degrees and all that time keep cold/high rpm about 1200

There are many causes of hard starting but illustrative ones are a faulty engine coolant temperature switch (sensor), worn spark plugs, inadequate fuel delivery or pressure (clogged fuel filter), and contaminated or old gasoline. When the engine is cold, high...

Q: Need to know the backlash specifications for a 2006 Denali transfer case.

Hi there. On most applications that deal with gear lash or known as backlash there is very low amounts of lash to prevent damage to the gears but also allowing the metal to expand. For your transfer case, set the...

Q: Transmission slipping and rough shifting - 1990 Toyota Cressida

Hello, thanks for writing in about your 1990 Toyota Cressida. The transmission is most likely the issue in this case. The fluid level and condition need to be checked. If the fluid level is extremely dark or exhibits a burnt...

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 Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...