2012 Chevrolet Impala

I have about 08/1825 had the throttle body replaced on my vehicle which assisted with the problem temporarily. Then the problem started again 09/20/25 the car act like it’s stalling while driving and can’t see what hear the vehicle is in. The car is not getting any signal to the engine as I have been advised the TCM is faulty. There was a code of U0101.

I have trouble codes that occasionally come up even after vehicle has been serviced. The vehicle used to drive fine. Now it started miss firing. I was told the problem was coming from the engine compartment/sensors. An OBDII diagnosis detects a problem with B Camshaft Position Timing Over Advanced or System Performance Bank 2 (p0024). I fear that without the fix, the miss firing can cause an accident. The engine light is illuminated when this happens.

TL* THE CONTACT OWNS A 2012 CHEVROLET IMPALA. THE CONTACT STATED WHILE DRIVING AT 15 MPH, THE VEHICLE STALLED CAUSING THE STEERING TO LOCK AND THE BRAKES TO FAIL. AS A RESULT, THE VEHICLE CRASHED INTO STREET SIGN CAUSING THE VEHICLE TO FALL INTO A DITCH. THE CONTACT STATED THE ABS AND CHECK ENGINE WARNING LIGHT WAS ILLUMINATED. THE AIR BAGS FAILED TO DEPLOY. A POLICE REPORT WAS FILED.THERE WERE NO INJURIES SUSTAINED. THE VEHICLE WAS NOT DRIVABLE AND WAS TOWED TO AN IMPOUND LOT. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED AS OF YET. A DEALER WAS NOT CONTACTED. THE MANUFACTURER HAD NOT BEEN INFORMED OF FAILURE. THE FAILURE MILEAGE WAS 176,000.

TL* THE CONTACT OWNS A 2012 CHEVROLET IMPALA. THE CONTACT STATED THAT AFTER STARTING THE VEHICLE, THERE WAS AN ABNORMALLY LOUD SOUND COMING FROM BEHIND THE DASHBOARD. THE VEHICLE WAS DIAGNOSED BY AN INDEPENDENT MECHANIC AND THE CONTACT WAS INFORMED THAT THE AIR CONTROL MOTOR WAS DEFECTIVE AND NEEDED TO BE REPLACED. THE AIR CONTROL REGULATOR ARM MOTOR WAS REPLACED HOWEVER, THE FAILURE RECURRED. A DEALER WAS NOT CONTACTED OR INFORMED OF THE FAILURE. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 90,000.

1ST - 8/11/2018 - 79,653 MILES - CHECK ENGINE LIGHT CAME ON, CODE P0411 SECONDARY AIR INJECTION SYSTEM INCORRECT FLOW DETECTED. DEALERSHIP STATED THE SOLENOID MALFUNCTION CHECK ENGINE CAME BACK ON, CODE P0411, CHEVROLET STATED THE SECONDARY AIR INJECTION SYSTEM IS FUNCTIONING AS DESIGNED AND RESET THE CODE. CHEVY'S STATED THE FAULTY SIR INJECTION SOLENOIDS BANK 1 AND 2 WAS THE CAUSE OF THE CHECK ENGINE LIGHT CODE P0411. ADVISED ME THAT THE BATTERY TERMINAL MAY BE THE ISSUE AND RECOMMENDED CHANGING IT. RECOMMEND A NEW ALTERNATOR. CHEVY WAS UNABLE TO VERIFY THE CODE P0411 BUT MADE A RECOMMENDATION FOR THE ISSUE. CHECK ENGINE LIGHT CAME BACK ON AGAIN, NO OTHER ISSUES WITH THE VEHICLE AT THAT TIME. GM OPENED A TAC CASE. ADVISED BY TAC THAT CARBON BUILDUP IN THE CYLINDER VALVES FROM THE CYLINDER HEADS WAS THE CAUSE. TOLD TO DRIVE VEHICLE FOR A FEW DAYS. WITHIN 3 DAYS CHECK ENGINE LIGHT CAME BACK ON. CHEVY INSTALLED A VEHICLE DATA RECORDER PER THE GM FIELD SERVICE ENGINEER. TEST RESULTS SHOWED BOTH AIR INJECTION CUT OF VALVES NEEDED TO BE REPLACED. FUTURE ALSO UPDATED ECM CALIBRATION AND PROGRAMMED IT - COVERED UNDER WARRANTY. 6TH VISIT ON 9/3/2019 AT 85970 MILES CHEVROLET ADVISED THE CAUSE IS DUE TO THE LEFT TEMPERATURE CONTROL AND AIR INLET ACTUATORS. 7TH - 9TH TIME, ADVISED BY INDEPENDENT AUTO REPAIR SHOP, THAT EVERYTHING WAS WORKING AS NORMAL. CHECK ENGINE LIGHT CODE WAS RESET. ADVISED CAR NEEDS TO BE CALIBRATED AT GM-APPROVED DEALERSHIP. AS OF TODAY, THE CHECK ENGINE LIGHT REMAINS ON. THE FINAL SHOP ADVISED THE ISSUE MAY BE THAT THE SYSTEM WAS NOT CALIBRATED OR JUST NEEDED TO BE CALIBRATED EVERY TIME THE CHECK ENGINE LIGHT CAME ON. I BELIEVE THAT THOUSANDS OF GM CUSTOMERS ARE PAYING OUT OF POCKET FOR UNNECESSARY P0411 REPAIR WORK.*DT*JB

ABOUT 2 MONTHS AGO THE ENGINE STARTING DIESELING (THE ENGINE WILL STILL HAVE COMBUSTION AFTER THE IGNITION WAS TURNED OFF). DURING A TRIP ON CITY STREETS THE ENGINE SUDDENLY STOPPED WHEN DRIVING. I WAS ABLE TO PUT THE CAR IN NEUTRAL AND RESTART THE ENGINE. ABOUT 15 MINUTES LATER THE ENGINE STOPPED AGAIN THIS TIME WHILE STOPPED ON A TRAFFIC LIGHT. I COULD NOT RESTART THE CAR. I HAD IT TOWED TO THE AUTOLAB IN PLYMOUTH MI WHERE THEY DIAGNOSED IT WITH ENGINE FLOODING. YOU COULD SMELL THE UNBURNED GASOLINE ON THE TAIL PIPE. HOWEVER NO ERROR CODES WERE REPORTED. AFTER A FEW DAYS IN THE FACILITY AND WITHOUT THE EVEN DUPLICATED I HAD THE CAR BACK. COUPLE WEEKS LATER IT STARTED DIESELING AGAIN SO I WENT BACK TO THE AUTOLAB. THIS TIME THEY WERE ABLE TO DIAGNOSE THE INJECTION PUMP AS BEING FAULTY AND THE O2 SENSOR NOT BEING ABLE TO CONTROL THE FUELING. THEY REPLACED THE INJECTION PUMP AND SINCE THEN THE VEHICLE IS RUNNING WITHOUT PROBLEM. THE LACK OF ERROR REPORTING BY THE OBD AND THE SUDDEN ENGINE STOP WHILE THE CAR WAS IN MOTION MAKES ME FEEL I WAS LUCKY. I USUALLY DRIVE 30 MILE EACH WAY TO MY WORK PLACE. IF THE ENGINE STOPS ON THE HIGHWAY IT WILL CAUSE AN ACCIDENT AS I AM NOT ABLE TO USE THE BRAKES (POWER BRAKES!) OR THE STEERING WHEEL (POWER STEERING) PROPERLY TO TRY TO GET AWAY FROM THE TRAFFIC BEHIND BY GOING TO THE SHOULDER.

SERVICE STABILITRAK CAME ON WHEN MERGING ON TO THE FREEWAY, (WHICH INVOLVED A TURN TO GET ON THE ON-RAMP,) SHUTTING DOWN THE CAR COMPLETELY. ALMOST HIT BY A SEMI. I HAVE HAD THE BEARINGS REPLACED BECAUSE OF STABILITRAK LIGHT. HOW HAS THIS NOT BEEN RECALLED? MY FRIEND AND I ALMOST DIED BECAUSE OF THE FAULTY SENSORS OR WHATEVER IT IS WITH THESE CRAP BEARINGS. I WAS TOLD HOW THE BEARINGS ARE MADE WITH THE SENSORS BEING PLACED IN A COMPLETELY RIDICULOUS SPOT BY AUTO PARTS STORES. SAW PLENTY OF COMPLAINTS ONLINE WITH THIS VEHICLE. SAME ISSUE. HOW HAS NOTHING BEEN DONE WITH THIS?