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Engine-Codes – Ford – P0122 2002 Ford F150

P0122 2002 Ford F150 Code - Throttle Position Sensor Circuit Low Input

Quick Answer

The P0122 code for a 2002 Ford F150 indicates a Throttle Position Sensor (TPS) Circuit Low Input. Common causes include Worn TPS: The throttle position sensor may be worn out or damaged, leading to inaccurate voltage readings, Contaminated TPS: Dirt or debris may have entered the sensor, affecting its performance, Faulty wiring: Damaged or corroded wiring in the TPS circuit can disrupt the signal transmission. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0122 2002 Ford F150 indicates Throttle Position Sensor Circuit Low Input .
Common causes
Common causes include Worn TPS: The throttle position sensor may be worn out or damaged, leading to inaccurate voltage readings, Contaminated TPS: Dirt or debris may have entered the sensor, affecting its performance, Faulty wiring: Damaged or corroded wiring in the TPS circuit can disrupt the signal transmission.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0122 2002 Ford F150 Description

The P0122 code for a 2002 Ford F150 indicates a Throttle Position Sensor (TPS) Circuit Low Input. The throttle position sensor is a crucial component of the vehicle's fuel injection system, as it monitors the position of the throttle valve and sends this information to the Engine Control Module (ECM). The ECM then uses this data to adjust fuel delivery and ignition timing to optimize engine performance and fuel efficiency.

OBDII Code P0122 2002 Ford F150 - Throttle Position Sensor Circuit Low Input
P0122 2002 Ford F150 Code - Throttle Position Sensor Circuit Low Input

Common Causes of P0122 2002 Ford F150

  1. Worn TPS: The throttle position sensor may be worn out or damaged, leading to inaccurate voltage readings.
  2. Contaminated TPS: Dirt or debris may have entered the sensor, affecting its performance.
  3. Faulty wiring: Damaged or corroded wiring in the TPS circuit can disrupt the signal transmission.
  4. Loose connectors: Poor connections between the sensor and the ECM can result in low input readings.

Symptoms of P0122 2002 Ford F150

  1. Rough idling: The engine may idle erratically or stall due to incorrect throttle position readings.
  2. Poor acceleration: The vehicle may experience hesitation or lack of power when accelerating.
  3. Reduced fuel efficiency: Incorrect TPS readings can lead to inefficient fuel delivery, resulting in decreased gas mileage.
  4. Check Engine Light: The illumination of the Check Engine Light is a common symptom of a TPS circuit low input.

How to Fix P0122 2002 Ford F150

  1. Diagnose the issue: Use a scan tool to read the trouble codes and perform a thorough inspection of the TPS and its circuit.
  2. Replace the TPS: If the sensor is faulty, replace it with a new one and calibrate it according to the manufacturer's specifications.
  3. Check wiring and connectors: Inspect the wiring and connectors for any damage or corrosion, and repair or replace as necessary.
  4. Clear codes: After completing the repair, clear the trouble codes from the ECM and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0122 2002 Ford F150

The typical repair cost for a Throttle Position Sensor Circuit Low Input on a 2002 Ford F150 can range from $100 to $300, depending on the cost of the replacement sensor and the labor charges. This estimate may vary based on the location of the repair shop, the make and model of the vehicle, and the engine type. It's recommended to obtain quotes from multiple auto repair shops to find the best deal. Keep in mind that diagnostic time and labor rates can also influence the final cost.

What does this mean?

Tech Notes for P0122 2002 Ford F150

The TP sensor circuit is monitored by the PCM for a low TP rotation angle (or voltage) input through the comprehensive component monitor (CCM). If during key ON engine OFF or key ON engine running the TP rotation angle (or voltage) changes below a minimum calibrated limit, the test fails.



Fault exhibits a symptom of limited power. A TP PID (TP VPID) reading less than 3.42% (0.17 volt) in key ON engine OFF, continuous memory or key ON engine running indicates a hard fault.

When is the Code Detected?

The Throttle Position Sensor (TPS) signal 1 circuit has reported an open or low voltage

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0122 2002 Ford F150 Code

1. What are common symptoms of OBDII code P0122 in a 2002 Ford F150?

- Common symptoms include poor acceleration, rough idling, stalling, and reduced fuel efficiency.

2. What does the OBDII code P0122 indicate in a 2002 Ford F150?

- The code P0122 indicates a Throttle Position Sensor Circuit Low Input error in the vehicle's system.

3. What are the possible causes of the Throttle Position Sensor Circuit Low Input error in a 2002 Ford F150?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors, or issues with the engine control module.

4. How can I diagnose the Throttle Position Sensor Circuit Low Input error in a 2002 Ford F150?

- You can use a scan tool to read the trouble codes, visually inspect the sensor and wiring, and perform voltage tests to diagnose the issue.

5. Can I drive my 2002 Ford F150 with OBDII code P0122?

- It is not recommended to drive the vehicle with this code as it can lead to performance issues and potential safety hazards.

6. How can I repair the Throttle Position Sensor Circuit Low Input error in my 2002 Ford F150?

- Repair options include replacing the throttle position sensor, repairing or replacing damaged wiring, and resetting the trouble codes after fixing the issue.

7. Are there any DIY tips for fixing the P0122 code in a 2002 Ford F150?

- DIY tips include checking for loose connections, cleaning the throttle body, and ensuring proper installation of the new throttle position sensor.

8. Will resetting the trouble codes clear the P0122 error in my 2002 Ford F150?

- Resetting the trouble codes may temporarily clear the error, but if the underlying issue is not fixed, the code is likely to reappear.

9. How much does it cost to repair the Throttle Position Sensor Circuit Low Input error in a 2002 Ford F150?

- The cost of repair can vary depending on the extent of the issue, but it typically ranges from $100 to $300 for parts and labor.

10. Can a faulty throttle position sensor affect the performance of a 2002 Ford F150?

- Yes, a faulty throttle position sensor can significantly affect the performance of the vehicle by causing erratic acceleration, idling, and fuel consumption.

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