Q: On interstate, after 15-20 seconds car loses acceleration

asked by on

I had been driving at highway speeds for around 15-20 minutes when, (within 5 seconds) the yellow engine overheating warning light came on and then immediately turned to red. All acceleration power was lost and my car’s speed started dropping slowly. I tried the accelerator but it would not respond. With no acceleration, I had to cross three traffic lanes which almost caused several accidents. My car rolled to a stop on the highway. I turned the car off and waited for several minutes; then everything seemed fine. However, this same thing has now happened multiple times. Each time it has happened, I had been driving on the highway for 15-20 minutes. What is causing this and what should I do to fix it?

Hello. Thanks for writing in about your 2007 BMW 335xi. It sounds like the thermostat may be sticking. The thermostat needs to be checked and the cooling system needs to be checked to make sure that the coolant is flowing properly. If there are no leaks, then I would replace the thermostat first and do a block test to make sure that there is not damage to the engine. If you want to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the acceleration issue and let you know what needs to be done.

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. On interstate, after 15-20 seconds car loses acceleration

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: Electronic steering lock error, car cannot be started

Hello. This problem is usually caused by low battery voltage or an aftermarket battery. There are times when the lights for the car will work as well as all of the electric, but the car will not start because the...

Q: engine sputtering in the rain and having a harder time starting in the cold recently

Consistent occurrence of poor operation during periods of high humidity is a clear sign of current leakage in the ignition system. Such leakage can occur as moisture provides an unintended path to ground on the high tension spark plug wires...

Q: Cruise control turned on, sudden acceleration, high revving

Hey there. This could be from a defective cruise control switch shorted or a problem with the throttle control actuator. The vehicle should be towed to the dealer and left there until they verify and repair the problem. The dealer...

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...
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...