2007 Chevrolet Impala vehicle speed control problems

“Check engine light Code p2138 Change the throttle pedal position sensor the next day the car dropped down to 5 to 10 mph information center said engine safety been reduced to 5 to 10 mph plus my traction control light came on then information center said service traction control put my old throttle pedal position sensor back on and it turn traction control light out and the car went back to driving normal don't know how long its going to last before it goes back to 5 to 10 mph and the information center says engine decelerate to 5 to 10 mph.was on highway in Texas had to get over on shoulder quick car just slow down quick and pedal was to floor. Also keep failing state inspection due to failed OBDII test ( see vir).”

“HAD ISSUES WITH MY 2007 IMPALA 3.9L STALLING AND REDUCING POWER ON MY WIFE, AND AT TIMES ALMOST LEAVING HER IN OR ON THE ROAD. I HAVE REPLACED THE THROTTLE BODY, THROTTLE PEDDLE ( TWICE ) AND HAD THE CAR FLASHED AT THE LOCAL GM DEALER. NOW THE CAR NOT ONLY READS REDUCED ENGINE POWER IT READ STARTING DISABLED SERVICE THROTTLE AND DIED WHILE SHE WAS DRIVING DOWN A BUSY HIGHWAY DURING RUSH HOUR.. CAUSING HER TO ALMOST BE INVOLVED IN A BAD WRECK. THIS SERIOUSLY NEEDS TO HAVE ATTENTION OF WHOEVER AT GM IS OVER SAFETY, CAUSE THIS ISSUE WILL END UP IN A REALLY BAD SITUATION IF OR WHEN SOMEONE ENDS UP SERIOUSLY HURT OR KILLED. I MEAN YOU REALLY NEED TO PROGRAM THEM TO SLOWLY REDUCE POWER, NOT JUST TELL YOU THEN SHUT OFF COMPLETELY AND HAVE THE DRIVER FIGHT AND PANIC TO GET OFF THE ROAD THROUGH TRAFFIC, WHILE NOT GETTING RUN OVER IN THE PROCESS. BUT IF THERE IS A FIX WE NEED TO KNOW.”

“WHILE DRIVING MY CAR TO WORK ON TUESDAY 11-12-2019 AT 6 AM IN THE MORNING, MY BATTERY LIGHT CAME ON THEN, MESSAGE DISPLAYED BATTERY SAVER ACTIVE,AC HOT SHUT OFF, TRACTION ON AND REDUCE POWER, EVERYTHING CAME ON IN DASHBOARD AND ABOUT 10 MINUTES LATER THE WHOLE SYSTEM SHUT DOWN, AND CAR WILL NOT START BACK UP. HAD TO GET SOMEONE TO JUMP START IN ORDER TO START CAR BACK UP IT WILL RUN A PERIOD OF TIME AND IT HAPPEN AGAIN EVEN AFTER REPLACING A NEW BATTERY, STARTER AND ALTERNATOR I ALSO TAKEN IT TO DEALER SHIP TO RUN DIAGNOSING TEST AS WELL AND THEY CHARGE ME FOR SERVICE ALTHOUGH THEY SAID THEY DIDN'T FIND ANYTHING WRONG WITH CHARGING SYSTEM AT ALL .BUT THIS OCCUR DURING THE BUSY TIME OFF THE DAY AND A LOT OF TRAFFIC”

“POWER STEERING BOX WHEN CHECKING FLUID POP NOISE WHEN TAKING OFF CAP ALSO CHANGED SERPENTINE BELT STILL SQUEALING STIFF STEERING LEAK NOT DETECTED AT THAT TIME .#2 SHIFTING FROM 1ST TO 2ND GEAR IS VERY FAST NOT NORMAL”

“CAR RANDOMLY DISPLAYS REDUCED ENGINE POWER. ON INTERSTATE REDUCED DOWN TO 20MPH COULD HAVE GOTTEN MY FAMILY KILLED. RESEARCHED ONLINE ALOT OF IMAPALA HAVING SAME ISSUE. THIS IS VERY DANGEROUS”

“ENGINE POWER WAS REDUCED WHILE I WAS TRAVELING WITH THE FLOW OF TRAFFIC. I ATTEMPTED TO ACCELERATE BUT CAR STARTED SLOWING DOWN. TOOK THE VEHICLE FOR REPAIR AND REPLACED THE PEDAL POSITION SENSOR WAS REPLACED. I CONTACTED CHEVY DEALERSHIP SERVICE DEPT AND WAS TOLD IT'S A COMMON OCCURRENCE. IMPALAS HAVE A THROTTLE SENSOR INSTEAD OF CABLE. IF THE SENSOR GOES OUT, THE ENGINE POWER IS REDUCED TO PROTECT THE ENGINE INTEGRITY. IN SOME CASES, IT'S REDUCED SIGNIFICANTLY. THE MANUFACTURE NOTED MY CONCERN BUT THE REP WOULD NOT ESCALATE THE MATTER. I WENT ONLINE TO FILE A COMPLAINT AND THERE IS A CHEVY FORUM WITH SIMILAR CONCERNS. GENERAL MOTOR REPS REPLY WITH COMMON RESPONSES TO TAKE THE VEHICLE TO AN AUTHORIZED MECHANIC AND THEIR CONCERN HAS BEEN NOTED. I WAS INFORMED BY REPRESENTATIVE AT 800# FOR MANUFACTURE TO CALL BACK IF IT HAPPENS AGAIN. THANKFULLY I WASN'T GOING AT A HIGHER SPEED IN DALLAS TRAFFIC. NOT SURE IF I WOULD HAVE HAD THE LUXURY OF PULLING OVER.”