Question about 2003 GMC Yukon Denali

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Stability system reduced engine power

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Have engine and ABS codes pulled, this will give you a starting point of what is going on. Checker, Autozone or O'Rielly can help with code retrieval .

Posted on Dec 29, 2013

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Posted on Jan 02, 2017

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SOURCE: stability system disabled lights come on,why?

check the gas pedal if it doesnt have a cable it tends to go out it is a drive by wire system g.m. vehicles have a common problem

Posted on Feb 12, 2010

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SOURCE: Warning stating reduce engine power and something

Reduced power mode is when the electronic ignition is strategically is not firing all the cylinders to prevent catastrophic failure of your engine. The reason for the GM Engineers put the reduced power mode in the vehicle is so you can drive the vehicle under 50Mph for about 50 miles to a mechanic before the vehicle completely dies.

Posted on Jul 01, 2010

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I have an 2008 chevy impala as that sometimes give me the message "engine power reduced" "service stabilitrak" WHAT is the problem?


When there is an error with the stability ac system the computer can reduce engine power as a safety precaution. You need to have the stored codes read.

Aug 23, 2016 | Cars & Trucks

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What causes the "Reduced Engine Power", "Service Stability Control" and "Traction Control" warning lights to come on?


the "Reduced Engine Power", problem causes the PCM to disable "Service Stability Control" and "Traction Control" turning on the warning lights to come on for those systems . The reduced engine power is because of a problem with the electronic throttle control system or as GM calls it TAC system . 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 TP, 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.
© 2017 General Motors Corporation. All rights reserved.



Drive by Wire training Your best bet , take it to a GM dealer

Mar 04, 2017 | 2005 Pontiac Grand Prix GT

1 Answer

What is causing reduced engine power message to come on with check engine light and service stability control warning


There are a lot of things that can cause this. Get the check engine light test done for free at a local auto parts chain.

Aug 15, 2014 | 2011 Chevrolet Silverado 1500

1 Answer

What is ASC


ASC is a brand of Traction Control. It reduces engine power if the wheels begin slipping under heavy acceleration.

BMW used this brand for their first traction control system, which was replaced with ASC+T. ASC+T also brakes the slipping wheel to more quickly regain traction. Later ASC+T was replaced with DSC, their stability control brand.

Traction control systems have been replaced by more comprehensive stability control systems (mandatory on new cars in many countries), which ensure the car is always pointing in the direction you are steering.

Jan 14, 2014 | Cars & Trucks

1 Answer

Reduced engine power signaling


Need more info. I noticed you also have a Q on here about your stability system.... Just as a guess... I'd say you have low power and a lit up dash " including the ABS light ". You need to check your ABS system first. A bad wheel speed sensor or hub bearing can cause all of this. The ECM sees it as one wheel locking up and reduces engine power and trips the Stabilitrac.

Dec 31, 2013 | 2005 GMC Yukon Xl Denali

1 Answer

Can i turn off the stabilitrak of my equinox by dosconecting the battery?


Hello. sometimes you can reset the system by disconnecting the battery. but sounds like you have a electronic throttle body concern. this will cause the reduced power message and the stability light to come on. you really need to have the system scanned for trouble codes to see what is going on

Dec 18, 2011 | Chevrolet Suburban Cars & Trucks

1 Answer

Warning stating reduce engine power and something about stability


Reduced power mode is when the electronic ignition is strategically is not firing all the cylinders to prevent catastrophic failure of your engine. The reason for the GM Engineers put the reduced power mode in the vehicle is so you can drive the vehicle under 50Mph for about 50 miles to a mechanic before the vehicle completely dies.

Jul 01, 2010 | 2003 GMC Yukon Denali

1 Answer

My 2006 Chevy Tahoe displayed the Reduced Engine power and stability control system turned off. Drove the vehicle home at reduced power never. Temp OK, Battery gage read lower than the normal +14V, Oil...


the post that everybody refuse to read or acknowledge is the first simple instruction
when ever there is a problem , have the fault codes read first
it is free at autozone and other parts shops
then knowing what the problem is you can have it fixed at an accredited service center for less money that fixing what is not faulty costs

Apr 05, 2017 | Chevrolet Tahoe Cars & Trucks

1 Answer

Stability system disabled lights come on,why? also reduced engine power lights come on and the car doesnt go over 30 mi per hr


check the gas pedal if it doesnt have a cable it tends to go out it is a drive by wire system g.m. vehicles have a common problem

Feb 12, 2010 | 2003 GMC Yukon Denali

1 Answer

What is esp off alert on dashboard


ESP means Electronic Stability Program.

Resources @ http://www.caradvice.com.au/14153/2008-kia-sportage-review/

ESP monitors the vehicle's response to the driver's steering and braking inputs to detect oversteer or understeer. If sensors detect that a skidding condition is developing, ESP brakes individual front or rear wheels and/or reduces excess power as needed to help keep the vehicle going in the direction the driver is steering.

What does the ESP off switch do?
The switch disables ESP's capability to reduce the engine torque. It also reduces the ESP intervention threshold to about 20%.

How do I know ESP is working?
The triangle in the center of the speedometer flashes when ESP intervenes; either with ESP switched on or off. It's a reminder to adjust your speed to the prevailing road conditions, usually by reducing it. If instead one "steps on it", with ESP ON, the engine power may be reduced to prevent a potentially critical situation.

Electronic Stability Program (ESP®)
The standard-fitted ESP® system selectively applies braking forces to the front and rear wheels in such a way as to reduce the risk of skids and slides and help the driver maintain control in critical situations. The system extends the technology of the anti-lock braking and acceleration skid control systems with a range of additional sensors which are used principally to detect yaw motion.

The ESP® computer continuously compares the actual behaviour of the vehicle with the computed ideal values. The moment the car deviates from the direction intended by the driver, specially developed control logic causes the system to intervene with split-second speed to bring the car back on track. It does this in two ways:

    Precisely controlled braking at one or more wheels

    Reducing engine power.

ESP® in this way helps to stabilise the vehicle in critical situations.

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Sep 02, 2009 | Kia Sportage LX Cars & Trucks

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