Throttle/Pedal Position Sensor/Switch 'A' / 'B' Voltage Correlation

I WAS DRIVING IN SUBDIVISION AT 20MPH AND VEHICLE WENT INTO LIMP MODE. IT HAD A MESSAGE SAYING ENGINE POWER REDUCED, SERVICE STABILITY TRACK AND CHECK ENGINE LIGHT WAS ON. IT WOULD NOT ACCELERATE MORE THAN 5MPH. THIS IS VERY DANGEROUS! LUCKILY I WAS NOT GOING 70 ON THE FREEWAY. I'VE BEEN READING ON CHEVY FORUMS AND GM FORUMS OF THIS HAPPENING TO THOUSANDS OF PEOPLE. MANY GOT IN ACCIDENTS BECAUSE OF REDUCED ACCELERATION TO 3 OR 5 MPH. I TOOK IT TO THE DEALER IT HAS A P2135 CODE AND IS DIE TO A BAD THROTTLE BODY AND THROTTLE POSITIONING SENSOR. THE CHEVY MANUFACTURER IS NOT WILLING TO DO ANYTHING ABOUT IT ALTHOUGH IT'S A KNOWN ISSUE TO CHEVY AND GMC CARS FROM MANY YEARS OF VEHICLES, FROM WHAT…

THE VEHICLE WAS DRIVING NORMAL IN SUBURBAN TRAFFIC. STOP & GO WITH SPEEDS UP TO 40 MPH. DURING STOP AT LIGHT THE CHECK ENGINE LITE CAME ON AND THE VEHICLE WOULD NOT ACCELERATE. THE YELLOW CHECK ENGINE LITE IS ON. THE VEHICLE IS IN LIMP MODE. OBDII CODES: P0122, P0222, P2111, P2135. THROTTLE BODY FAILURE. *JS

DRIVING DOWN THE INTERSTATE WHICH IS 70 MPH I GOT THE ERROR OF REDUCED ENGINE POWER AND ALSO P2135 IT WENT OFF FOR ABOUT THREE WEEKS AND IT HAPPENED AGAIN TODAY ON MY COMMUTE TO WORK.MY CHEVROLET MALIBU IS A LITTLE OVER A YEAR OLD. THIS CAR HAS HAD SO MANY ISSUES THAT NEED TO BE FIXED

WHILE RANDOMLY DRIVING MY CHECK ENGINE LIGHT AND THROTTLE LIGHT COMES ON. I'VE HAD MY CAR TO THE DEALER MULTIPLE TIMES. THE CODES ARE P2135 AND P0121. DEALER SAID THEY CAN'T FIND ANYTHING WRONG. THEY DIDN'T CLEAR THE CODE. WENT HOME AND SLEPT, NEXT MORNING THE LIGHTS ARE OFF. THIS HAS BEEN A CONTINUOUS ISSUE. THEY REPLACED THE THROTTLE BODY DECEMBER 2018, MY GAS PEDAL 2 MONTHS AGO AND PART OF MY COMPUTER OVER A MONTH AGO AND THIS IS STILL HAPPENING. I'VE READ IN A BUNCH OF FORUMS THIS IS COMMON BUT NO ONE HAS A SOLUTION. DEALER SAID MY WIRING HARNESS WAS FINE AND THEY CAN'T FIND THE PROBLEM BUT DON'T WANT TO REPLACE THE THROTTLE POSITION SENSOR EVEN THOUGH IT'S UNDER WARRANTY. HELP

The vehicle is displaying error messages Reduced Engine Power, Service Stabilitrak, Service Traction Control. It also has the related service indicator lights for the Stabilitrak, the Traction Control, and the Check Engine Light is on. There is a service bulletin for this issue that only addresses the 2008-2011 model years, my vehicle is a 2012 and thus not included in the current bulletin and should be added to the covered vehicle list. #11-06-04-007B : Diagnosis and Repair - Malfunction Indicator Lamp (MIL) Illuminated, Reduced Power Message Displayed, DTC P2135 Set - (April 16, 2012)

WHILE DRIVING VEHICLE CONTINUES TO DROP INTO REDUCED POWER MODE CAUSING A JARRING MOTION AS IT DROPS A SIGNIFICANT AMOUNT OF SPEED,ALMOST CAUSING MULTIPLE ACCIDENTS. THE CHECK ENGINE LIGHT COMES ON, TRACTION CONTROL TURNS OFF, STABILLITRACK TURNS OFF, AND ENGINE GOES INTO LIMP MODE AND STARTS SHAKING AND JARRING. THE SAME 2 CODES CONTINUE TO COME UP IN DIAGNOSIS. P2135 AND P2176. I HAVE TAKEN THE VEHICLE TO THREE MECHANICS 1 OF THEM BEING CHEVY ITS SELF. WITH NO SOLUTION FOUND. I HAVE HAD THE ACCELERATION PEDAL REPLACED, THE WIRING REPLACED, THE IGNITION SWITCH AND RELAY REPLACED HAD THE THROTTLE BODY CONNECTOR REPLACED, THE THROTTLE BODY AND GASKET REPLACED 3 TIMES. I HAVE DONE EVERYTHING…

WHILE IN MOTION OR IDLING VEHICLE INTERMITTENTLY JERKS, SHAKES, OR STALLS. RPMS FLUCTUATE, THROTTLE SENSOR WARNING AND MIL ILLUMINATE, DTC OF P0121 AND P2135 ARE STORED. VEHICLE HAS SUDDENLY LOST POWER ON INTERSTATE WHILE IN MOTION AT 70 MPH THROTTLE POSITION WARNING AND MIL ILLUMINATED. VEHICLE STALLED WHILE IN MOTION AT 55 MPH ON HIGHWAY, THROTTLE POSITION WARNING AND MIL ILLUMINATED. BOTH INSTANCES HAVE OCCURRED MULTIPLE TIMES AND ARE INTERMITTENT AND WITHOUT WARNING. ALL INSTANCES HAVE OCCURRED IN MODERATE TO HEAVY TRAFFIC CREATING AN IMMEDIATE THREAT TO LIFE AND LIMB. MANUFACTURER HAS NOT ISSUED ANY RECALLS FOR THIS ISSUE DESPITE NUMEROUS CONSUMER COMPLAINTS. VEHICLE HAS 66545 MILES.

Throttle body and accelerator pedal position sensors failed. Component is available for inspection upon request. Independent service center confirmed failure on 1/3/2026 with 6 stored fault codes: P2101, P0122, P0222, P0123, P0223, P2135. Vehicle shuts off while driving without warning at various speeds. Loss of power steering and power brakes occurs when engine stalls, creating immediate risk of crash, injury or death to occupants and other drivers. Manufacturer customer service confirmed in writing 4 times that engine shutting off while driving is a safety issue and that these exact codes match Service Campaign 2022090005. On 1/7/2026, manufacturer denied campaign applies to this vehicle…

I WAS DRIVING AND THE REDUCED ENGINE POWER, SERVICE STABILI TRACK, CHECK ENGINE WARNINGS CAME ON. MY CAR WOULD ONLY ACCELERATE TO 5MPH. LUCKILY I WASN'T ON THE FREEWAY, WAS ONLY GOING 20 MPH AND ALMOST HOME. VERY DANGEROUS. I PUT AN END CODE READER ON IT AND IT'S A P2135 CODE, THROTTLE POSITIONING SENSOR. I HAVE BEEN READING CHEVY CRUZE FORUMS AS WELL AS IN CHEVY FORUMS IN THE PAST WEEK, A MINIMUM OF 1000 PEOPLE THAT I CAN SEE HAVE HAD THIS ISSUE. MANY HAVE BEEN IN ACCIDENTS BECAUSE OF THIS. ITS OCCURED IN MAINLY CHEVY CRUZE BUT ALSO IMPALAS, GMC VEHICLES. I TOOK IT TO THE DEALER AND I NEED A NEW THROTTLE BODY, THERE IS NO SPECIAL COVERAGE ALTHOUGH ITS OCCURED IN THOUSANDS OF VEHICLES IF NOT…

DRIVING IN STOP AND GO TRAFFIC. STOPPED AT LITE. CHECK ENGINE LITE CAME ON. NO POWER. HAD TO IDLE HOME. OBDII CODES P0122, P0222, P2111. P2135. TPS READING STUCK AT 82%. DEFECTIVE THROTTLE BODY. *JS