Q: Car lost all power after downshifting to go uphill

asked by on

This morning the transmission downshifted to get up a hill, while I was driving on the highway at about 73 mph. My car lost all its power. As soon as it got back down to 2500 RPMs, it was fine; however, above 2500 RPMs it acts like it just doesn’t want to run. It slows down, the RPMs jump around between 2500-3000 and the car feels like its getting power for just a second, then it loses power again and starts slowing down… then it regains power back to 2500 RPM. The previous pattern happens in all gears and it only has the problem when it is completely warmed up. There’s nothing audibly out of the ordinary and as much as I can tell, everything is fine. One note: the Check Engine light has been on for years (this is my beater car so I didn’t get it checked out). Last summer, all the plugs and wires were replaced, I changed the trans fluid and the filter. There haven’t been any major problems in the past two years, since I purchased it used.

Hello! Although the Check Engine Light has been on before a new issue may have occurred, I would suggest hooking a scan tool up to the vehicle and retrieving the OBD2 codes. The problem you’re having should almost certainly set a new check engine OBD2 code.

The code definition will help pinpoint the failure that is causing the trouble for your vehicle. I suspect that the issue maybe with the mass air flow sensor or the throttle position sensor.

If you decide to get this fixed, enlist a qualified technician who has the tools and experience to diagnose the loss of power you experienced. Once the problem has been pinpointed an accurate repair can be made.

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. Car lost all power after downshifting to go uphill

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: What would be cost effective ? Rebuilding my 5.4 triton engine or buying at refurbish one

Hi there. When it comes to rebuilding an engine and buying an engine that is rebuilt, there could be different cost when it comes to the job. When rebuilding the engine, there are engine kits that are in need to...

Q: Transaxle light coming on

With the engine fully warmed up and running in PARK, open the hood and look for the transmission dipstick. Pull it out and give it a wipe. Dip it back into the tube and pull it out, this time noting...

Q: shifting at higher rpm's than normal in hot weather

When the temperature is hot outside, the air density is low in comparison to the wet cold air of winter. This means there is less power available because there is less air to combust. Your car needs an air fuel...

Related articles

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...