AutoCodes – Ford – P0122 2002 Ford F150

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

Quick Answer

The throttle position sensor (TPS) responds to the accelerator pedal movement. Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection. 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 Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection.
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.

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Code Popularity 9,316

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0122 2002 Ford F150 Description

The throttle position sensor (TPS) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

OBDII Code P0122 2002 Ford F150 - Throttle Position Sensor Circuit Low Input - AutoCodes.com — P0122 2002 Ford F150 Code - Throttle Position Sensor Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0122 2002 Ford F150?

Faulty throttle position sensor.
Throttle position sensor harness is open or shorted
Throttle position sensor circuit poor electrical connection

How to Fix the DTC P0122 2002 Ford F150?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0122 2002 Ford F150 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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.