Full Answer
Why does my 2010 Chevy Silverado LD have engine reduced power?
"This letter is intended to make you aware that some 2010 model year Chevrolet Silverado LD vehicles, equipped with a V8 engine, may have a condition where the throttle position sensor may cause the engine to run rough and cause the malfunction indicator lamp and/or an Engine Reduced Power message to illuminate.
Why does my Duramax say reduced engine power?
For example, a faulty high-pressure fuel pump might reduce engine power, thereby causing the warning to illuminate. If you’ve got a Duramax diesel, the Reduced Engine Power warning could Illuminate for a variety of reasons.
What does “reduced engine power” mean?
“Reduced Engine Power” or “Engine Power is Reduced” is a warning message that continues to baffle and frustrate many General Motors (GM) vehicle owners. Is your Chevy or other GM vehicle displaying this warning on the instrument cluster? Maybe the check engine light is on as well?
What is reduced power mode on a GM car?
GM’s Reduced Power Mode can inhibit your vehicle’s ability to accelerate. Even if power isn’t reduced immediately, performance may be limited the next time you go to drive the car. In some instances, the PCM may actually cut off fuel delivery to the engine, rendering the vehicle undrivable.
What does it mean when a Chevy Silverado says reduced engine power?
“Reduced Engine Power” Message In most cases, the Engine Power Reduced warning indicates that your car's performance has been intentionally limited. Your car's primary computer, often known as the powertrain control module (PCM), triggers Reduced Power Mode when it detects a system failure.
How do you fix engine power is reduced?
If you are wondering how to bypass reduced engine power, there are a few ways you can do this, which are explained below in detail.Check Catalytic Converter. ... Clean Air Filter. ... Check ECU. ... Check Sensors. ... Repair Exhaust Leaks. ... Check Electrical Wiring and Cables.
What causes reduced engine power to come on?
The reduced engine power light comes on when the vehicle's computer detects a fault in any of the systems that allow the engine to run optimally, such as airflow sensors, throttle sensors and oxygen sensors.
Can I drive with reduced engine power?
Can you drive safely with the Reduced Power Light on? It depends on the cause of the reduced power. Often, the problems are minor. In rare cases, though, reduced power can cause more serious problems like a seized engine, or even an electrical fire.
How much does it cost to fix engine power reduced?
The cost of these repairs can vary greatly depending on the culprit, but most fixes will cost between $100 and $500. First, a mechanic will need to determine what is wrong with your engine.
Can bad spark plugs cause reduced engine power?
This causes many problems, like increased exhaust emissions, reduced fuel economy, and reduced engine power. A single misfiring spark plug can cause enough raw fuel to be dumped into the exhaust, causing it to overheat and damage the catalytic converter.
Can low transmission fluid reduce engine power?
When engine response to distorted conditions begins, transmission fluid is one of the major things to replace immediately. Hence, the reduction in engine power which would make the engine wear and tear in no time.
How do you reset the throttle position sensor on a Chevy Silverado?
The easiest way to reset your throttle position sensor is to unhook the negative cable from your battery for up to five minutes or to remove the fuse for your engine control module.
Can low oil pressure cause reduced engine power?
When engine oil pressure drops, friction between different parts increases. This results in a steep decline in engine performance. Watch out for common signs of decreased engine performance such as a reduction in fuel economy, loss of power, and engine stalling.
Problem Description
The throttle position sensor (TPS) on the Chevrolet Silverado 1500 is notorious for failure which causes:
Chevrolet Silverado 1500 Vehicles With This Problem
The average cost for a Chevrolet Silverado 1500 Throttle Position Sensor Replacement is between $171 -$231. Learn More
What does engine power reduced mean?
In most cases, the Engine Power Reduced warning indicates that your car’s performance has been intentionally limited. Your car’s primary computer, often known as the powertrain control module (PCM), triggers Reduced Power Mode when it detects a system failure.
When does a GM engine enter reduced engine power mode?
Some GM vehicles will enter Reduced Engine Power Mode when the engine begins to overheat due to cooling system issues.
What does reduced power mode do to a car?
GM’s Reduced Power Mode can inhibit your vehicle’s ability to accelerate. Even if power isn’t reduced immediately, performance may be limited the next time you go to drive the car. In some instances, the PCM may actually cut off fuel delivery to the engine, rendering the vehicle undrivable.
What happens when a TAC sensor goes bad?
When one (or both) of the sensors goes bad, the vehicle will enter Reduced Engine Power Mode. Circuit Issues. Circuit issues, such as damaged wires and poor connections, can prevent the TAC system from operating properly. This can cause an array of problems, including a vehicle that enters Reduced Engine Power mode.
6.0 Smitty
MY 05 2500 HD 6.0 was showing codes p0120 p0220 p2135 all related to Throttle Body Position and Pedal Positon Sensors. Fixed by cleaning ground on block, drivers side bottom of block where oil pan mee
ifixedit
For anyone reading this old post regarding the numerous years of Silverado's going into "reduced power mode" I will share my findings, hope this helps someone with this very frustrating problem which I also have dealt with on and off for the past few years and FINALLY fixed.
Paul Pruett
For anyone reading this old post regarding the numerous years of Silverado's going into "reduced power mode" I will share my findings, hope this helps someone with this very frustrating problem which I also have dealt with on and off for the past few years and FINALLY fixed.
ifixedit
Glad to hear your truck is running good again! Just a little add on here as I've once again experienced some of the "reduced power" nonsense again. In another post here I reported after all I did which is noted above, I ended up finding that much of the original GM wiring (along with the grounding issues) can also be suspect.