Symptoms of a Bad or Failing Throttle Controller

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Cost of Replacing a Bad or Failing Throttle Controller

Common signs include intermittent throttle control, throttle hesitation or problems hesitating, and drastic changes in fuel economy. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Throttle Controller Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2003 Ford E-350 Super Duty $690 $563.55 $126.00 8% $757.05
2012 Jeep Grand Cherokee $386 $315.85 $70.00 8% $423.35
2003 GMC Savana 2500 $695 $624.97 $70.00 5% $732.47
2003 Mercedes-Benz CL500 $1165 $1088.34 $77.00 3% $1206.59
2011 Land Rover LR4 $922 $852.32 $70.00 3% $959.82
2011 Porsche Cayenne $403 $305.38 $98.00 11% $455.88
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How to Diagnose a Bad or Failing Throttle Controller?

throttle controller

Most cars, trucks, and SUVs that are on the road today are monitored and operated with literally dozens of computer controlled electronic systems. Whether it's the electronic ignition system or advanced emission control units, each system works independently to operate specific components that allow drivers to start and drive their vehicles. One of the most important systems in use today is the electronic throttle controller, which receives an electrical signal from the physical action of depressing the throttle pedal and controls the opening and closing of the throttle body.

What is the throttle controller?

The Throttle Controller is the electronic version of what used to be operated by a mechanical cable. The function of the throttle control is operated by what we know as an accelerator or gas pedal. In earlier model vehicles, this pedal was connected to a cable that ran from the pedal to the engine and was connected to a mechanical linkage mounted to a carburetor or throttle body. As you press down on the accelerator pedal, the throttle control cable pulls on the linkage described above which is connected to what is often times referred to as a “butterfly valve” inside the throttle body.

As this opens and closes, a sensor referred to as a Mass Air Flow Sensor monitors this change in air which relays this information to your car’s ECM, or Electronic Control Module. The ECM then increases the amount of fuel being sent to the injectors in order to maintain the proper air/fuel mixture. As the ECM processes this information, it makes the requisite changes to fuel flow at the fuel injectors.

Under most circumstances, the throttle controller will last for the life of the vehicle. However, like any other mechanical and electrical component, there are some instances when it will fail, wear out or simply break. If this occurs, it will cause a few symptoms to occur that often alert the driver that a problem with the throttle control exists and corrective action is needed by a certified mechanic. Noted below are a few of the common warning signs of a bad or failing throttle controller.

1. Intermittent throttle control

The throttle controller is controlled electrically as opposed to the older, mechanical cables that ran from the throttle pedal to the throttle body. In some instances, the electric signal is disrupted, whether due to a loose electrical wire, a relay control issue, or damage done to a sensor. In any case, in some instances it will cause the throttle controller to lose a signal and deliver intermittent throttle control. Sometimes this is a minor issue that is more of an inconvenience while other times it can cause the vehicle to shut down or for the driver to lose the ability to control the throttle pedal.

If you notice that while pressing down on the throttle pedal that the car does not accelerate, it may be caused by a damaged throttle controller and should be inspected and serviced by a professional mechanic.

2. Throttle hesitation or problems accelerating

In some cases a damaged throttle controller will cause the engine to have issues with acceleration or cause a "stumbling" effect when the throttle is engaged by the driver. This can result in lack of performance and can be a safety concern if not inspected and repaired quickly. Not having full access to the throttle can lead to accidents and in the worst case, a stuck throttle.

3. Drastic changes in fuel economy

When the throttle controller is damaged, it can also cause fuel to be consumed more frequently than it should. In this case, the problem may be caused by a miscommunication link from the throttle controller and the engine's air fuel mixture which is regulated by the mass air flow sensor on many cars.

When any of these warning signs occur, an engine with a throttle controller will trigger an OBD-II error code that is stored inside the ECM and can be downloaded and inspected by a professional mechanic with a digital scanner. This will also trigger the Check Engine Light to illuminate on the dashboard.

Once they determine the source of the error code, the corrective action can be recommended and the problem with the throttle controller can be fixed correctly.

In most cases, issues with the throttle controller are electric, either caused by a damaged sensor or electrical relay. However, there are times when the throttle controller is damaged and needs to be replaced. Anytime you experience the above symptoms or warning signs, take time to contact a local ASE certified mechanic who can inspect your issue and replace the throttle controller if that is the correct solution to your problem.

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Recent Throttle Controller Replacement reviews

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YourMechanic Throttle Controller Replacement Service

Average Rating

5/5

Number of Reviews

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Rating Summary
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Joel

18 years of experience
562 reviews
Joel
18 years of experience
Nice guy. Very friendly
2005 DODGE DURANGO - THROTTLE CONTROLLER - JACKSONVILLE, FLORIDA

Curtis

26 years of experience
82 reviews
Curtis
26 years of experience
The experience was excellent. Not only is he a great mechanic, he is a great person. I've learned things from him that I have never learned in my life. Truly one of a kind experience.
2007 DODGE NITRO - THROTTLE CONTROLLER - CAYCE, SOUTH CAROLINA

Paul

30 years of experience
57 reviews
Paul
30 years of experience
Mr Schafer was on time and very professional. He did a very fast job and my car runs great!!!!..I will be asking for his service again. You have got a good mechanic on your site.
2014 DODGE AVENGER - THROTTLE CONTROLLER REPLACEMENT - RALEIGH, NORTH CAROLINA

Nathan

14 years of experience
95 reviews
Nathan
14 years of experience
Nathan did an excellent job
2009 CHEVROLET TAHOE - THROTTLE CONTROLLER - AUSTIN, TEXAS

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