If your vehicle displays the message “Engine Power Reduced,” you’re not alone.
The message can occur for countless reasons and may even vary from vehicle to vehicle. Thankfully, your vehicle’s DTCs can guide you in the right direction, but they don’t give a complete diagnosis.
Here are some common causes of engine power reduction and how to fix them. You might be surprised to learn that a few simple modifications can help fix the problem.
GM’s Reduced Engine Power Mode inhibits the vehicle’s ability to accelerate
When you encounter a REDUCED ENGINE POWER message on your dashboard, you should immediately take it to a mechanic. While this message may be accompanied by other codes, it’s not indicative of a serious problem.
Typically, the REDUCED ENGINE POWER message will appear only if there is a specific problem with your vehicle’s PCM. A malfunctioning PCM can result in short circuits or bad connections.
There are multiple TSBs mentioning this problem. To find the specific TSB for your vehicle, consult a repair database.
Mitchell DIY and ALLDATA DIY are two good examples. You may be able to find PIP4578B, which discusses an electrical short in the cooling system fan clutch. This TSB applies to 2002-2005 Midsize GM SUVs.
Another reason for a GM Reduced Engine Power Mode warning is a faulty pedal position sensor. A faulty APP sensor is a common cause. It can be located anywhere in the vehicle, including the accelerator pedal itself.
Because the throttle actuator control system uses a sensor to detect a driver’s foot pressure, a faulty APP sensor will limit a vehicle’s ability to accelerate.
Engine power reduction
There are several common causes of engine power reduction in your car. Some are immediate, like a faulty fuel filter or a damaged catalytic converter. Others will gradually diminish your car’s performance over time.
If you notice a decrease in power, it’s a good idea to replace the filter and have your engine looked at by a mechanic. To avoid engine power reduction, check your car’s air filter for clogs.
A TSB is an informative document that alerts the public of a potential problem. It isn’t a recall, but it will give you more insight into the cause of engine power reduction.
If you can’t pinpoint the problem, you can repair your car yourself with a little research and know-how. A simple OBD2 scanner will give you the information you need to determine what the problem is.
Checking spark plugs is also an easy fix for a reduction in engine power.
There are various possible reasons why your engine power reduction warning light comes on. Your vehicle may be running too lean or too rich. It may also have a bad MAF sensor or throttle body.
Other causes of engine power reduction include a clogged catalytic converter or a faulty high-pressure fuel pump. You should visit a mechanic if you notice any of these problems. Fortunately, the majority of these cases are simple and straightforward.
Symptoms it indicates
You may be wondering what the Check Engine Light is doing to your car. A solid light means a few things, including a loose gas cap. A flashing light indicates a more serious problem, like the transmission or ignition system needs repair.
A steady light means it isn’t as urgent, but still needs to be investigated. Thankfully, the symptoms are relatively easy to identify. Here are some of the most common problems this warning light can indicate.
When you notice your car’s check engine light, take note of the color. Does it blink or stay solid? Is it flashing? Is it solid? Solid color checks can indicate a serious problem that may need immediate attention.
The best course of action is to take your car to the mechanic. Depending on what the light means, it could indicate many different problems. It’s crucial to take your car to the mechanic for a proper diagnosis.
Fixes for engine power reduction
If you’re unable to turn off the engine power reduction light, you may have a problem with your throttle position sensor. This small device is located near the air filter and allows the engine to take in air.
It’s easy to fix and can save you time and money compared to replacing the entire engine. Unlike the throttle position sensor, which is a fairly complicated part, replacing the throttle body requires only a small amount of mechanical knowledge.
Your car’s engine can be causing this problem if it’s clogged. When the filter is clogged, air cannot flow through the engine. When this happens, the car will lose engine power and fuel consumption.
This can result in poor performance, increased fuel consumption, and even premature engine failure. Replace the air filter if needed. If the problem continues, you may need to replace the entire engine.
A professional repair shop can fix the problem for you and turn off the Reduced Power warning, so you can get back on the road.