Ford F-350 Throttle Position Sensor (1999-2009): A Complete Guide
Solve rough idling and poor acceleration by understanding how to choose the right throttle position sensor for your truck.
- First, confirm if your truck needs a separate sensor or a complete accelerator pedal assembly, as this varied by year and engine.
- Symptoms include rough idle, poor acceleration, stalling, and erratic shifting.
- Due to reports of premature failure with some aftermarket parts, consider a premium brand like NGK/Standard Ignition or OEM (Motorcraft) to avoid repeat repairs.
- After replacement, performing a computer reset by disconnecting the battery or a pedal relearn procedure is recommended.
Is Your F-350 Running Rough? It Could Be the Throttle Position Sensor.
If your Ford F-350 is hesitating, idling poorly, or shifting erratically, a failing throttle position sensor (TPS) is a likely culprit. This sensor is a key communicator between your foot on the gas pedal and the engine's computer. When it starts to fail, it sends bad information, leading to a range of driveability problems. Replacing it is a common repair for the 1999-2009 F-350, but choosing the right part is crucial to avoid doing the job twice.
Common Ordering Mistake
Before you buy, know what you have. On many gasoline F-350s and early 7.3L Power Stroke models, the TPS is a small, separate sensor bolted to the throttle body. However, on later 7.3L models (build date after approximately late 2000) and subsequent diesel engines, the sensor is integrated into the entire accelerator pedal assembly inside the cab. If the sensor is part of the pedal, you must replace the entire assembly. Always verify your truck's build date and engine type before ordering.
Symptoms of a Bad Throttle Position Sensor
A failing TPS can make your truck feel unreliable. Watch for these common signs:
- Rough or Unstable Idle: The engine may idle too high, too low, or surge up and down.
- Hesitation or Lack of Power: When you press the gas, the truck might hesitate, stumble, or feel sluggish. You might notice "dead spots" as you accelerate.
- Engine Stalling: The engine might die when you come to a stop or take your foot off the gas quickly.
- Erratic Automatic Shifting: The transmission may shift hard, at the wrong times, or seem to hunt for gears.
- Poor Fuel Economy: An incorrect air-fuel mixture caused by a bad sensor can lead to a noticeable drop in MPG.
- Check Engine Light: A failing TPS will often trigger the Check Engine Light and store diagnostic trouble codes like P0121 or P0122.
Choosing the Right Aftermarket TPS: Brand Quality Matters
Forum discussions among F-350 owners reveal a common frustration: some aftermarket throttle position sensors can fail quickly, sometimes within months. While saving money is tempting, a cheap sensor can lead to repeated repairs. For this specific part, brand quality makes a difference.
Aftermarket Brand Tiers
- Premium Aftermarket (NGK, Standard Ignition): Brands like NGK (under their NTK sensor line) and Standard Ignition have a strong reputation for producing reliable sensors that meet or exceed OE specifications. They are often tested for durability and may come with a better warranty, making them a solid choice for owners who want quality without the full OEM price.
- Standard Aftermarket (Motorad, True Tech): These brands offer a cost-effective solution and are widely available. Motorad, for example, states their parts are designed to OEM specifications. They can be a good option for a budget repair, but be aware that some owners have reported shorter lifespans with value-oriented brands for this particular component.
Cost to Replace a Ford F-350 Throttle Position Sensor
The cost depends on whether you are replacing just the sensor or the entire pedal assembly. The prices below are estimates.
| Part | Estimated Cost |
|---|---|
| New OEM (Motorcraft) Sensor | $90 - $150 |
| New Aftermarket Sensor | $38 - $112 |
| New Accelerator Pedal Assembly (Aftermarket) | $120 - $300+ |
| Shop Labor | $75 - $150 |
Frequently Asked Questions
Where is the throttle position sensor located on a 1999-2009 F-350?
For most gasoline engines and early diesels, it's a small black plastic sensor bolted to the side of the throttle body, which is where the large air intake tube connects to the engine. For many diesel trucks built after late 2000, the sensor is integrated into the accelerator pedal assembly under the dashboard.
Can I drive my F-350 with a bad throttle position sensor?
It is not recommended. While you may be able to limp the truck, symptoms like stalling, lack of acceleration, and erratic behavior can be dangerous in traffic. Some vehicles may enter a "limp mode" with severely reduced power. It's best to get the sensor replaced as soon as possible.
Is replacing the TPS a DIY job?
Yes, for many owners. If it's the sensor on the throttle body, it's usually held on by two screws and is easy to access. Replacing the accelerator pedal assembly is also straightforward, typically involving a few bolts and an electrical connector. The main challenge can be removing the old screws from the throttle body, as they can be stuck with thread-locker.
Do I need to reset the computer after replacing the TPS?
It's a good practice. After installing the new sensor, you can disconnect the battery's negative terminal for about 20 minutes to clear the computer's memory and force it to relearn the new sensor's parameters. Some owners also report success with a specific pedal relearn procedure found in forums, which involves turning the key on and slowly pressing and releasing the gas pedal a few times before starting the engine.
Are there any recalls for the F-350 throttle position sensor?
Based on searches of the NHTSA database, there are no specific safety recalls for the throttle position sensor on the 1999-2009 Ford F-350. Recalls found were for much newer model years and different components.
Technical Specifications
OEM Part Numbers: F2AZ-9B989-A E7TZ-9B989-D F6TZ-9B989-AA 1C34-9F836-CA
The throttle position sensor for the 1999-2009 Ford F-350 can be either a standalone sensor mounted to the throttle body or an integrated component of the accelerator pedal assembly. The throttle-body-mounted sensor is typically a 3-pin or 4-pin potentiometer-style sensor that translates the rotation of the throttle shaft into a voltage signal. The accelerator pedal assembly is a drive-by-wire unit that contains the sensor within the pedal mechanism itself.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Ford F-350:
- 🛍️ Shop This Part
- Is Your F-350 Running Rough? It Could Be the Throttle Position Sensor.
- Common Ordering Mistake
- Symptoms of a Bad Throttle Position Sensor
- Choosing the Right Aftermarket TPS: Brand Quality Matters
- Aftermarket Brand Tiers
- Cost to Replace a Ford F-350 Throttle Position Sensor
- Frequently Asked Questions
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