Question about 2007 Chevrolet Tahoe

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An error message stating reduced engine power can across my message board when I start my 2007 Chev. Tahoe LTZ. The engine light is on and a traction control error message. The odometer/car does not move when accelerating, it feels more like I am braking. Can you help?

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Traction cotrol problem take it to the dealer

Posted on Jan 31, 2010

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I have an 07 avalanche z71. I was driving the other day and the truck went into reduce engine power traction control disable check engine light and service air bag. Now it does it after five miles.


Get a computer diagnostics done and it will likely tell you what is wrong. You can buy readers now for less than $100.00. Otherwise you are really guessing.

Oct 02, 2016 | 2007 Chevrolet Avalanche LTZ

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My tahoe has the traction off light what doe that mean?


It means the traction control system has been disabled. It can be done manually by pressing the switch on the dash or by an onboard computer (meaning there is a problem). If you can't press the button to get the light off, then get it scanned. Traction control system works with the anti-lock braking system and the engine to help the driver control the vehicle in the event it should be slipping or skidding. It will activate the anti-lock brakes, help reduce steering pressure to better steer and can sometimes cut out engine cylinders to reduce the power going to the wheels to better control in the skid.

Jan 27, 2011 | 2007 Chevrolet Tahoe

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Reduced engine power on


The traction control uses the speed sensor in the transmission and the wheel speed sensors to determine wheel spin. If a wheel spins braking is applied to it so that the power can be transferred to the other wheels. At some point the ECU detected a gross disagreement between the sensors and so as a precaution has entered into a limp home mode. On some systems if the fault is in error it can be cleared by putting the car into drive and moving forward a meter, putting in reverse and going a back a meter and doing this three times. If one or other of the sensors are faulty this process will not allow the error to be cleared. You need to check or have checked the error codes and the speed sensors.

May 28, 2010 | 2007 Chevrolet Impala LS Sedan New Cars

1 Answer

The "engine power is reduced" light comes on


po455 is Probable Cause[s]

1. Defective, loose or missing fuel cap
2. EVAP canister broke, hose cracked or not connected
3. Purge or vent solenoid defective
4 . Vacuum leak at engine po121 code po121 means Throttle Position Sensor/Switch A Circuit Range/Performance Problem . it is usually indicative of a faulty throttle position sensor or faulty wiring harness in the engine bay.

Feb 27, 2010 | 2006 Chevrolet Impala

2 Answers

Engine power is reduced keeps showing on the dash screen, as does service traction control. the car is running rough and has no power when this occurs.


how do you fix the "reduced engine power" light on the dash bard of a 07 Chevy Impala LTZ and "Service Traction Control"?

Feb 12, 2010 | 2006 Chevrolet Impala

2 Answers

Service Throttle Control


It sounds like these things are all related. When the a computer sees a problem in the Electronic throttle system, it will dissable traction control, and give the reduced engine power alert because the powertrain computer does not know the value of throttle postion.
Codes will need to be scanned in the computersto begin diagnosis.
TechJK

Jan 30, 2009 | 2007 Chevrolet Impala LS Sedan New Cars

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