Skip the auto shop - Our mechanics make house calls

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.

A: Hello! Although the Check Engine Light has ...

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?

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: Car is running roughly at around 45 mph

Hello. It is possible that all of the spark plugs and spark plug wires need to be replaced in order to fix the problem on your Plymouth Grand Voyager. Also, if carbon has built up in your intake, throttle body,...

Q: What should I know about the cabin air filter?

Your engine has an air filter, and it serves to protect the engine of the car from damaging dust, pollen and debris. Your car’s Air Conditioning system also has a filter – called a cabin filter. It serves the same...

Q: Why does my Transmission pops out of gear

Hello. Popping out of gear is a common problem when it comes to manual transmissions. The most common reason a manual transmission would jump out of gear is due to low or contaminated fluid, worn synchronizers inside the transmission, or...

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...
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...
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...