2006 Chevrolet Impala vehicle speed control problems

“According to my obd scanner the components that are failed is the throttle body position sensor circuit A & the throttle body position sensor circuit B. Before this happened the check engine light was on for about a week, when I scanned the vehicle with the obd-II the code for a large leak in the fuel EVAP system came up. One day while driving the vehicle I was stopped at a red light and once the light turned green I pressed the gas and the car started to sputter and move very slow also in the driver information center it intermittently showed the warnings service traction control and speed reduced. I had to pull over when safe to do so. Once I got the vehicle home I ran the scan again and it came up with the throttle body position sensor codes. The part is available for inspection. The safety of me and my passenger were in jeopardy we could've definitely been in an accident because it was so sudden when it happened. I have not taken the car to a dealer but an independent mechanic has looked at it. Vehicle has not been inspected by anyone other than me and an independent mechanic. This was a very scary experience and I have seen many forums with the same issues…”

“TL* THE CONTACT OWNS A 2006 CHEVROLET IMPALA. THE CONTACT STATED THAT THE TRANSMISSION GEARS FAILED TO PROPERLY CHANGE OVER IN DRIVE TO ACCELERATE. AS A RESULT, THE VEHICLE INTERMITTENTLY DECELERATED AND JERKED. THERE WAS NO WARNING INDICATOR ILLUMINATED. THERE WAS ALSO A DRASTIC REDUCTION IN ENGINE POWER. THE DEALER HAD NOT BEEN CONTACTED. AN INDEPENDENT MECHANIC DIAGNOSED THAT THE CONTROL PRESSURE SOLENOID NEEDED TO BE REPLACED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURES. THE VEHICLE WAS NOT ABLE TO BE SAFELY DRIVEN AND WAS PARKED. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 129,000.”

“I WOULD LIKE IT DOCUMENTED THAT SOMEONE IS GOING TO BE SERIOUSLY INJURED OR KILLED ALL DUE TO A KNOWN AND REPORTED ISSUED UNLESS CHEVY DOES THE RIGHT THING AND ISSUES A RECALL IMMEDIATELY! I HAVE A 2006 IMPALA AND WHILE DRIVING ON THE HIGHWAY AT 70 MILES PER HOUR MY VEHICLE DROPPED DOWN TO 15 MPH SAYING REDUCED ENGINE POWER THEN COMPLETELY SHUT OFF ON THE HIGHWAY. PLEASE NOTE MY 2 YEAR OLD SON, AND 10 YEAR OLD DAUGHTER WERE IN THE VEHICLE WITH ME. I WAS FORTUNATE ENOUGH TO MAKE IT OFF TO THE SIDE WITHOUT BEING HIT MUCH LESS KILLED BUT OTHER PEOPLE NOT MAY BE SO FORTUNATE. WHAT IS IT GOING TO TAKE FOR A RECALL TO BE ISSUED?”

“CAR FIRED A MESSAGE STATING "ENGINE POWER REDUCED" CAR WOULD NOT ACCELERATE. THE VEHICLE WAS STATIONARY AND BEING MOVED FROM STREET INTO DRIVEWAY WHEN MESSAGE WAS PROMPTED”

“WHILE DRIVING THE TRACTION CONTROL LIGHT CAME ON AS WELL AS THE CHECK ENGINE LIGHT THEN REDUCED POWER SO THAT I WAS DRIVING AT ABOUT 5 MILES IN TRAFFIC. CAR THEN STOPPED AND THERE WAS NO POWER AT ALL. I PUT ON MY HAZARD LIGHTS AND TURNED THE CAR OFF WAITED A FEW MINUTES AND IT STARTED AND ONLY CHECK ENGINE LIGHT REMAINED ON. I WAS FORTUNATE TO BE ALMOST AT A RED LIGHT WHEN THIS HAPPENED IN MIDTOWN MANHATTAN SO THAT THERE WAS ONLY BLARING HORNS WHEN I COULDN'T MOVE THE CAR. MY MECHANIC SAID I NEED TO BRING THE CAR IN WHEN THE LIGHTS ARE ON SO THAT HE CAN READ THE ERROR MESSAGES. THE CHECK ENGINE LIGHT DOESN'T GIVE HIM ENOUGH INFORMATION. I HAVEN'T DRIVEN SINCE AS I'M AFRAID BUT WILL DRIVE LOCALLY AND BRING THE CAR TO THE MECHANIC AS SOON AS THOSE LIGHTS COME ON AGAIN. IT HAS HAPPENED BEFORE BUT NOT WHEN I COULD BRING IT TO THE MECHANIC. *TR”

“RECEIVED A ENGINE WARNING SYMBOL AND SOUND/CHIME AND THEN GOT THE MESSAGE, "POWER IS BEING REDUCED TO THE ENGINE". MY SPEED OF 40 MPH STEADILY LOWERED TO WHERE I PUT ON MY WARNING LIGHTS AS CARS WERE PILING UP BEHIND ME. I WAS ABLE TO TURN OFF ON A SIDE STREET WHERE THE CAR STOPPED. MY MECHANIC HAS READ THE CODES AND REPLACED INDICATED PARTS, BUT THE PROBLEM HAPPENS AGAIN OFTEN. BELOW IS A WEB SITE URL WHERE YOU CAN SEE NUMEROUS PEOPLE REPORTING THE SAME PROBLEM. IT IS DANGEROUS AS IT HAPPENS TO PEOPLE ON INTERSTATES WHERE THEY HAVE NO WHERE TO GET OUT OF TRAFFIC. THERE ARE MORE THAN 22 PAGES OF 100S OF REPORTS OF THIS REDUCED POWER MESSAGE AT: HTTP://FORUMS.EDMUNDS.COM/DISCUSSION/13406/CHEVROLET/IMPALA/CHEVY-IMPALA-REDUCED-ENGINE-POWER-MESSAGE/P1”