AutoCodes – Ford – P1120 2003 Ford F150

P1120 2003 Ford F150 Code - Throttle Position Sensor Out of Range

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: P1120 2003 Ford F150 indicates Throttle Position Sensor Out of Range.
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 6,060

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 Apr 25, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1120 2003 Ford F150 Description

The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. The TPS is a rotary potentiometer sensor that provides a signal to the Powertrain Control Module (PCM) that is linearly proportional to the throttle plate/shaft position. As the TPS is rotated by the throttle shaft, the following operating conditions are determined by the PCM:
• Closed throttle (includes idle or deceleration)
• Part throttle (includes cruise or moderate acceleration)
• Wide open throttle (includes maximum acceleration or de-choke on crank)
• Throttle angle rate

OBDII Code P1120 2003 Ford F150 - Throttle Position Sensor Out of Range - AutoCodes.com — P1120 2003 Ford F150 Code - Throttle Position Sensor Out of Range

What does this mean?

What are the Possible Causes of the DTC P1120 2003 Ford F150?

Faulty throttle position sensor
Throttle position sensor harness is open or shorted
Throttle position sensor circuit poor electrical connection
Throttle position sensor not properly adjusted

How to Fix the DTC P1120 2003 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 below the closed throttle position through the comprehensive component monitor (CCM). If during key ON engine OFF or key ON engine running the TP rotation angle (or voltage) remains within the calibrated self-test range but falls between 3.42 and 9.85% (0.17 and 0.49 volt), the test fails.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1120 2003 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 P1120 2003 Ford F150 Code

1. What are the common symptoms of OBDII code P1120 on a 2003 Ford F150?

The common symptoms of code P1120 include rough idling, stalling, poor acceleration, and potential issues with the vehicle's fuel efficiency.

2. What can cause the OBDII code P1120 (Throttle Position Sensor Out of Range) on a 2003 Ford F150?

The P1120 code on a 2003 Ford F150 is typically caused by a malfunctioning throttle position sensor or a problem with the sensor's wiring or connectors.

3. How can I diagnose the cause of OBDII code P1120 on my 2003 Ford F150?

To diagnose the cause of code P1120, you can use a scan tool to check the sensor's voltage readings, inspect the sensor's wiring for damage, and perform a throttle position sensor test.

4. Can I still drive my 2003 Ford F150 with OBDII code P1120?

It is not recommended to drive your Ford F150 with code P1120 as it can lead to poor engine performance and potentially unsafe driving conditions. It is best to address the issue promptly.

5. How do I repair OBDII code P1120 on a 2003 Ford F150?

To repair code P1120, you may need to replace the throttle position sensor, repair any damaged wiring or connectors, and clear the code using a scan tool.

6. What are some tips to prevent OBDII code P1120 on a 2003 Ford F150?

Regularly inspecting and maintaining your vehicle's throttle position sensor, keeping the sensor and its wiring clean, and addressing any issues promptly can help prevent code P1120.

7. How much does it cost to fix OBDII code P1120 on a 2003 Ford F150?

The cost to fix code P1120 can vary depending on the extent of the issue and whether you DIY or take your vehicle to a mechanic. Replacing the throttle position sensor can range from $100 to $300.

8. Can a bad throttle position sensor cause other issues besides triggering code P1120 on a 2003 Ford F150?

Yes, a faulty throttle position sensor can cause a variety of issues such as poor engine performance, rough idling, stalling, and even problems with transmission shifting.

9. Are there any recalls related to OBDII code P1120 on a 2003 Ford F150?

There are no known recalls specifically related to OBDII code P1120 on the 2003 Ford F150. However, it's always a good idea to check with Ford or the NHTSA for any updates.

10. How long does it take to fix OBDII code P1120 on a 2003 Ford F150?

The repair time for code P1120 can vary depending on the severity of the issue and your level of experience. In general, it can take anywhere from 1 to 3 hours to address the problem.