Q: Engine power reduction

asked by on

After being in a stop position, like at a stop sign, when I accelerate my Impala, it lunges forward. Now, the car's 'Check Engine Light' is coming on, plus a message: 'Reduced Engine Power'. I have tried restarting my car, but it doesn't always work. Sometimes I have to drive with reduced power/speed. What is causing these problems?

There are several different things that could possibly be causing this issue. One of the more likely causes would be a fuel or ignition problem causing the transmission to react differently than if the engine were running normally. The Check Engine Light always comes on quickly when one of these issues exists. It is also quite possible that a catalytic converter could be failing, causing the same issue.

My best recommendation would be to get multiple opinions. YourMechanic offers mobile mechanics that will come to your home and inspect your vehicle’s loss of power condition. This could be another way to generate a second opinion. A full inspection of the fuel, ignition, and exhaust systems is recommended for best results in the diagnosis of this issue.

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. Engine power reduction

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 idling roughly and jerking, check engine light came on

Quite a few items can cause a misfire condition in your vehicle. Usually worn spark plugs are the most common cause, so they are usually replaced first before diagnosis can proceed any further. Since yours have been replaced as well...

Q: Problem with shifting positions

It may very well be that your vehicle has a problem that is causing reduced power output. Some such things could be: Faulty fuel pump Faulty oxygen sensor Vacuum leak When any of these occur, the...

Q: Worried about a noise in the engine

Having an engine noise can be annoying and damaging over time. Did the noises start after having the oil and filter changed? I ask because there are some aftermarket oil filters which will cause pressure variations in the engine, creating...

Related articles

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...
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...