2005 Nissan Sentra Cruise Control Problems

While driving at 30-35 mph, your car suddenly revved up and accelerated on its own without you pressing the gas pedal. You had to downshift manually to slow the vehicle back down. The dealer inspected it but couldn't find or fix the problem. This issue could involve the throttle control system, fuel injectors, or engine control computer needing inspection and possible replacement or reprogramming.

THROTTLE POSITION SENSOR SYSTEM - CONSISTS OF TWO PARTS; THE GAS PEDAL AND THE THROTTLE BODY CONTROL UNDER THE HOOD. VEHICLE WILL RUN NORMALLY AND WHEN THE TPS FAILS, IT WILL DROP ENGINE RPM TO LESS THAN 1000 RPM NO MATTER THE POSITION OF THE GAS PEDAL. MOST OFTEN OCCURS RIGHT AFTER STARTING THE VEHICLE AND IN SHIFT PATTERN BETWEEN GEARS, HOWEVER, IT CAN HAPPEN AT INTERSECTIONS OR AT SPEED ON THE HIGHWAY THUS CAUSING AN UNSAFE SITUATION. WHEN IT HAPPENS, THE ONLY WAY TO RESOLVE THE ISSUE IS TO SHUT OFF THE ENGINE AND RESTART THUS RESETTING THE SENSOR. DEPENDING ON THE FAILURE LEVEL OF EITHER PART OF THE SENSOR, DEPENDS ON HOW OFTEN THE PROBLEM DESCRIBED ABOVE OCCURS. I HAVE HAD BOTH PARTS OF THE TPS REPLACED AND THERE IS STILL AN ISSUE WHERE THE ENGINE SPUTTERS AT HIGH RPM EVEN WITH NO SERVICE ENGINE SOON LIGHT CURRENTLY ON AT THIS TIME. THE ENGINE SPUTTERING I FEEL IS RELATED TO THE THROTTLE POSITION SENSOR SYSTEM PROBLEM. EITHER WAY, IT IS A SAFETY ISSUE WHEN IT OCCURS IN FAST MOVING TRAFFIC, INTERSECTIONS OR AT SPEED ON THE FREEWAY. *TR