4990721 | Genuine Cummins® Throttle Body Actuator

1. Control Engine Power

• The actuator opens the throttle plate to allow more air into the engine when you press the gas pedal.

• This increases engine power and vehicle speed.

2. Work With Electronic Throttle Systems

• In vehicles with a Drive-by-Wire Throttle System, the throttle is controlled electronically instead of by a cable.

3. Improve Fuel Efficiency

• The actuator allows the Engine Control Module (ECM) to precisely control airflow, helping the engine use the correct amount of fuel.

4. Reduce Emissions

• Accurate control of air entering the engine helps ensure cleaner fuel combustion and fewer harmful exhaust gases.

5. Support Safety and Driver Assistance Systems

• The actuator allows the engine computer to manage power for systems like:

  • Cruise control

  • Traction control

  • Stability control

1. Check Engine Light

• The Engine Control Module (ECM) may detect a problem and turn on the check engine light.

• Common codes relate to throttle actuator control.

2. Poor or Delayed Acceleration

• When you press the gas pedal, the vehicle may hesitate or respond slowly.

3. Vehicle Goes Into Limp Mode

• The car may limit speed and power to protect the engine.

4. Rough Idle

• The engine may shake or idle unevenly because the throttle plate is not controlling airflow properly.

5. Engine Stalling

• The engine may stall when stopping or idling.

6. Inconsistent Throttle Response

• The car may speed up or slow down unexpectedly even if the pedal position stays the same.

7. Difficulty Maintaining Speed

• It may be hard to keep a steady speed while driving.