Q: Reduced engine power

asked by on February 08, 2016

My engine has reduced power.

Reduced Power light is on Inspection $79.99 - $99.99 Get a Quote

I’m assuming that you are getting a message that says "Reduced Engine Power" in the driver information center. This is most likely due to a problem with the throttle system.

There is no cable to actuate the throttle body; instead, your vehicle has sensors that determine how far you are pressing the gas pedal. This is translated through the electronic actuator that opens and closes the throttle body. When there is a problem with one of the sensors or actuators in this system, it will reduce engine power because it does not know how far the throttle body is opened. Once the fault in the throttle system is repaired, the Reduced Engine Power message will go away.

My suggestion is to hire a good mobile mechanic to run a scan on your "Reduced Engine Power" message to get to the bottom of the issue.

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

What others are asking

Car stalls when stopped

If the car starts that would eliminate the starter as a problem, I would suggest enlisting the help of one of our certified mechanics at YourMechanic, and have them do a complete inspection to find the cause of your stalls...

Obd codes 33,34, and 43 what does this mean? 1993 Chevrolet K1500

Hi - the diagnostic trouble codes you mention are: 33- Manifold Absolute Pressure circuit/sensor malfunction: wiring open circuit/shorted circuit to positive, hose blocked/leaking, MAP sensor, 34- manifold Absolute Pressure circuit/sensor malfunction: wiring shorted to ground, 42- ignition control module circuit...

I've been hearing this strange low pitched "womp womp" sound, I turn left it goes away. I turn right it gets worse.

What you are describing sounds like a wheel bearing that may be starting to fail. A wheel bearing will usually fail due to pitting or small damage on the surface of the rollers or the bearing race. Both the surface...

My 2010 Chevy Impala won't shift into any gear

Hello there. Usually when your car will not shift into any gear, it's caused by a damaged shift solenoid or speed sensor. It's also possible that an obstruction of debris exists inside the transmission hydraulic lines. To correctly diagnose this...

Steering wheel vibration when braking

Most likely, your tires and/or wheels are out of balance. Balance problems are typically most evident at speeds above 45 miles per hour. A professional can inspect your vehicle to determine if this is indeed the issue. If it is,...

My car battery is dead but the brake light on dashboard is on

Hello and thanks for writing in. Often times many dash lights will illuminate when the battery is dead, indicating that a particular system (in this case the braking system) does not have the proper voltage to it. This is inherently...

Not starting MAP/MAF

There are a number of Sprinter-specific issues to check here: make sure power door lock fuse isn't blown (safety interlock), check glow plug module, and make sure the ignition key hasn't lost its security setting (try an alternate, known good...

New key for my truck won't work

You will have to have the dealer reprogram the new key and transponder for it to work with your truck. The dealer will have the special scanner to do the programming. This is typical for most vehicles that have lost...

Battery light

Hello. This may be caused by a faulty ground connection or potentially a bad voltage regulator. Try checking to be sure you have a good connection from the battery to the car's chassis (black negative battery cable from the battery...

Related articles

What Is the Difference Between a Diesel and a Gasoline Engine?
Gasoline and diesel engines use similar components but ignite fuel differently. Gasoline engines use spark plugs, while diesels rely on compression.
How Engine Timing Works
Your Your car engine consists of a number of rapidly moving parts, including a crankshaft, camshaft, pistons, engine valves, rods and pulleys. As the piston moves up and down, the valves move correspondingly, in and out. The crankshaft spins, and...
How to Understand Compression and Power Systems in Small Engines
Being familiar with basic compression and power system functions of a four-stroke engine can help you diagnose and fix issues with your car.