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If a "Reduced Engine Power" warning message pops up on your dash, it means that the powertrain control module has detected a system failure and it has intentionally limited your vehicle's performance. The Engine Reduced Power Mode is a fail-safe mode that can prevent your vehicle from accelerating
reduced engine power sensor ??? There is no reduced engine power sensor, Now a message on the DIC -driver information center, reduced engine power is a different story . Reduced Engine Power
Refer to Powertrain Control Module Description in Engine Controls
Reduced Engine Power Mode
When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
• Acceleration limiting--The PCM will continue to use the accelerator pedal for throttle control; however, the vehicle acceleration is limited.
• Limited throttle mode--The PCM will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited.
• Throttle default mode--The PCM will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The PCM will perform the following actions:
• Limit engine speed to idle by positioning the throttle position, or by controlling the fuel and spark if the throttle is turned off.
• Ignore the accelerator pedal input.
• Engine shutdown mode--The PCM will disable fuel and de-energize the throttle actuator.
You need to hook up a scan tool an check for DTC'S - diagnostic trouble codes .
Jerry, Drive to a good shop. So many things can cause reduced power light unfortunately. The first step would be to get the truck hooked up to a scanner/computer and have the computer scanned for trouble codes. One thing that you could try is to drain the water from the water separator that is mounted on the frame under drivers front door. If the PCM picks up on water, power is reduced until water is removed/drained. It could be an exhaust sensor that is reading faulty. Unfortunately from here its impossible to tell you exactly what the fault is because there are just so many engine sensor inputs that could cause your problem. Check the attached links, forums,instruction and guides, Good luck
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May 27, 2014 - 10 posts - ‎5 authors
OK, many things can cause a reduced engine power message, ... as a regen message and no, idling long enough to fix a wheel WILL NOT plug it up. ... I have a monitor onmy truck that I can watch the accumulated soot grams ...
www.underhoodservice.com/tech-tip-reduced-engine-power-message-dis... Dec 10, 2012 - Tech Tip: Reduced Engine Power Message Displayed on GM Vehicles ... Model year 2008-'10 vehicles must have the engine control module (ECM) reprogrammed ... Do not drop the electronic throttle control components.
Are you getting a
ENGINE POWER REDUCED message ? Is the check engine light on ?
Reduced Engine Power Mode
Throttle Actuator Control (TAC) System
electronic throttle control .
When the ECM detects a condition with the TAC system the ECM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
?€¢
Limited torque
?€¢
Limited range of throttle movement
?€¢
Engine OFF
Your going to need to take this to a ASE certified repair shop or the dealer , you probably don't have the diagnostic tools to trouble shoot this problem. https://youtu.be/oPPLAHSSluw
Engine power reduced , problem with the electronic throttle control ! Watch a couple of video's on youtube , google GM engine power reduced . The gas pedal an the throttle body have position sensor's ,when the PCM/ECM - engine computer see conflicting input's from one of these sensors it send's into a reduced power mode . Your best bet mite be to take it to a qualified repair shop.
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