Question about 2002 Chevrolet TrailBlazer

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Service egine light comes one when I drive aggressively and now and then a light that says reduce engine speed comes on.

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There is a really cheap tool its about 60$ Its called an OBD tool you get it at the AUTOPART store and plug in under steering wheel dash

Posted on Jul 19, 2009

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2007chevy malibu


You must get the engine control computer scanned for fault codes, this is the first thing that must be done before any diagnostics can be done to find the problem that has put the engine in "LIMP" mode.

Dec 28, 2016 | 2007 Chevrolet Malibu

1 Answer

What does it mean when my 2008 trailblazer LT stabilitrac service light comes on?


Service Stability System Message The message center displays the service stability system message when any one of many VSES-disabling DTCs is set. The EBCM sends a serial data message to the IPC requesting this display.
It means there is a problem an till you get it fixed the stability control system is disabled ! ( EBCM ) electronic brake control module Has detected a problem an set a DTC - diagnostic trouble code in it's memory an had the message displayed !
Vehicle Stability Enhancement System (VSES)
The vehicle stability enhancement system (VSES) provides added stability during aggressive maneuvers. Yaw rate is the rate of rotation about the vehicle's vertical axis. The VSES is activated when the electronic brake control module (EBCM) determines that the desired yaw rate does not match the actual yaw rate as measured by the yaw rate sensor.
The desired yaw rate is calculated by the EBCM using, primarily, the following inputs.
?€¢
The position of the steering wheel


?€¢
The speed of the vehicle


?€¢
The lateral, or sideways acceleration of the vehicle

The difference between the desired yaw rate and the actual yaw rate is the yaw rate error, which is a measurement of oversteer or understeer. When a yaw rate error is detected, the EBCM attempts to correct the vehicle's yaw motion by applying brake pressure to one or more of the wheels. The amount of brake pressure which is applied varies, depending on the correction required. The engine torque may be reduced also, if it is necessary to slow the vehicle while maintaining stability.
VSES activations generally occur in turns during aggressive driving. When braking during VSES activation, the pedal may pulsate. The brake pedal pulsates at a higher frequency during VSES activation than during ABS activation.


It

Jun 19, 2015 | 2008 Chevrolet Trailblazer

1 Answer

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

Reduced engine power


Have the vehicle checked for DTC'S - diagnostic trouble codes ! Do you know what electronic throttle control is ? The gas pedal assembly has electrical connector an sensors inside ,hooked to the PCM / ECM - engine computer . The engine computer uses these position sensors inputs to control the DC motor on the throttle body to open the throttle plate to control the speed . Plus there are position sensors inside the throttle body to input PCM/ECM to see if it's calculations are corect . Your best bet maybe to take it to a qualified repair shop .
Drive by Wire Function and diagnostics by Wells

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 control module will continue to use the accelerator pedal for throttle control; however, the vehicle acceleration is limited.
• Limited throttle mode--The control module will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited.
• Throttle default mode--The control module will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The control module will perform the following actions:
- Limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned off.
- Ignore accelerator pedal input.
• Engine shutdown mode--The control module will disable fuel and de-energize the throttle actuator.

May 12, 2017 | 2004 GMC Sierra Denali

1 Answer

Reduced engine power comes on intermintley


Use a bottle of yellow HEET dry gas to remove any moisture problem in the fuel.

Clean / replace air filter.
Check ATF at level ground. Top off ATF to MAX level.

Jan 18, 2014 | 2004 Chevrolet Silverado 2500HD

1 Answer

How can I reduce my fuel consumption?


There are a few basic things you can do. The hardest to do and that which can be the biggest saver is to change your driving habits. Slow starts not fast away from lights, coasting to stops and not jumping on brakes, try to be totally non aggressive. In other words drive like you are being followed by a cop and don't want to be pulled over or like a little ole lady. Nice and easy. This is the one thing that can gain you mpgs not just tenths of a mpg. Look up hypermileing techniques for more hints. Keep your car in tune. Watch your tires air pressure and clean out all the unnecessary weight. the lighter the car the less power to accelerate and maintain speeds.

Sep 10, 2012 | Cars & Trucks

1 Answer

My 1991 Toyota Corolla drives fine and then suddenly it starts to hesitate.


mine did the same thing and it was oxygen sensor
since engine light came on there should be an error code
on computer.Get a diagnostic checker or take to a garage and have them hook uo to the diag connector. I bought a diagnostic checker few years ago and it has come in very handy
sure hope this helps!!

Jun 22, 2012 | 1991 Toyota Corolla

1 Answer

I have a 2003 Envoy- GMC. Why does the reduce engine speed light come on


you need to scan you vehicles ECM, there is a trouble code stored there. depending on where you live most parts stores( such as a shucks/orielleys) will have a scan tool they will let you use if the vehicle is in thier parking lot. this should diagnose the issue, provided the battery hasnt been disconnected since then.

Mar 12, 2012 | 2003 GMC Envoy

1 Answer

Service egine light keeps coming on after we reset


Something is not fixed. Though you say you fixed them or had them fixed doesnt mean it is all good. Sometimes defective parts. Unhook the battery for a few min. Then reconnect it. The drive about 30 nonstop miles. The computer will be clear then the problem codes will be stored and the light will come back on. Then re read it

Apr 06, 2010 | 1997 Chevrolet S-10 Pickup

4 Answers

Service Stabilitrak-Reduced Engine Power


the engine light is a generic fault indicator in your car to point out something is not quite right with the engine, having a loss of power as well is also known in some areas as Limp Mode or Safety Mode. it means the car is restricting the power it gives to ensure no damage it done to the engine.

the only certain way to find out what is wrong is to take it to a garage that has diagnostics equipment that can read the fault codes from the vechicles ECU (the fault codes will be the reason the light on the dash has come on as its reporting a fault somewhere)..

your mechanic should be able to tell you what is wrong with the engine from that and give you a more accurate cost at fixing it.

Dec 29, 2009 | 2007 Chevrolet Equinox LS New Cars

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