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P1120 2001 Ford F150 Code - Throttle Position Sensor Out of Range

Quick Answer

The P1120 diagnostic trouble code (DTC) for a 2001 Ford F150 indicates that the throttle position sensor (TPS) is out of range. Common causes include Wear and tear on the throttle position sensor, Loose or damaged wiring/connectors, Faulty ECM. 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 2001 Ford F150 indicates Throttle Position Sensor Out of Range.
Common causes
Common causes include Wear and tear on the throttle position sensor, Loose or damaged wiring/connectors, Faulty ECM.
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 13, 2024
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Code P1120 2001 Ford F150 Description

The P1120 diagnostic trouble code (DTC) for a 2001 Ford F150 indicates that the throttle position sensor (TPS) is out of range. The TPS is a crucial component of the vehicle's electronic fuel injection system, as it monitors the position of the throttle valve and sends this information to the engine control module (ECM). The ECM uses this data to determine the appropriate fuel delivery and ignition timing for optimal engine performance.

OBDII Code P1120 2001 Ford F150 - Throttle Position Sensor Out of Range
P1120 2001 Ford F150 Code - Throttle Position Sensor Out of Range

Common Causes of P1120 2001 Ford F150

  1. Wear and tear on the throttle position sensor
  2. Loose or damaged wiring/connectors
  3. Faulty ECM
  4. Carbon buildup on throttle body
  5. Incorrect TPS calibration

Symptoms of P1120 2001 Ford F150

  1. Rough idling or unstable engine speed
  2. Hesitation or surging during acceleration
  3. Reduced fuel efficiency
  4. Engine misfires
  5. Limp mode activation

How to Fix P1120 2001 Ford F150

  1. Begin by diagnosing the issue using a scan tool to confirm the P1120 code and identify the specific problem with the TPS.
  2. Inspect the TPS wiring and connectors for any damage or corrosion. Repair or replace as needed.
  3. Clean the throttle body and throttle plate to remove any carbon buildup that may be affecting TPS performance.
  4. Test the TPS for proper operation and calibration. Adjust or replace the sensor if necessary.
  5. Clear the DTC and reset the ECM to ensure the code does not return.

Cost to Fix P1120 2001 Ford F150

The typical repair costs for addressing a P1120 code on a 2001 Ford F150 can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor in your area. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Keep in mind that rates at dealerships or in metropolitan areas may be higher, while independent shops often offer more competitive prices.

What does this mean?

Tech Notes for P1120 2001 Ford F150

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.

When is the Code Detected?

Malfunction is detected when voltage from the sensor is sent to Engine Control Module (ECM) is out of range.

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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 2001 Ford F150 Code

1. What does OBDII code P1120 in a 2001 Ford F150 mean?

The code P1120 indicates that the throttle position sensor is out of range in a 2001 Ford F150.

2. What are the common symptoms of a faulty throttle position sensor in a 2001 Ford F150?

Common symptoms include poor acceleration, rough idling, stalling, and difficulty maintaining a consistent speed.

3. What are the possible causes of the throttle position sensor being out of range in a 2001 Ford F150?

Potential causes include a faulty throttle position sensor, damaged wiring or connectors, or issues with the throttle body itself.

4. How can I diagnose the throttle position sensor issue in my 2001 Ford F150?

You can use an OBDII scanner to retrieve the specific trouble code (P1120), visually inspect the wiring and connectors, and perform a voltage test on the throttle position sensor.

5. What are the repair options for fixing a throttle position sensor out of range in a 2001 Ford F150?

Repair options may include replacing the throttle position sensor, repairing damaged wiring or connectors, or cleaning and calibrating the throttle body.

6. Can I drive my 2001 Ford F150 with the throttle position sensor out of range?

It is not recommended to drive your vehicle with a faulty throttle position sensor, as it can lead to performance issues and potential safety hazards.

7. How much does it typically cost to repair a throttle position sensor issue in a 2001 Ford F150?

The cost of repairs can vary depending on the specific issue, but replacing a throttle position sensor can range from $100 to $300 including parts and labor.

8. How often does the throttle position sensor need to be replaced in a 2001 Ford F150?

The throttle position sensor typically does not need frequent replacement, but it can fail over time due to wear and tear or other electrical issues.

9. Will resetting the OBDII code P1120 in my 2001 Ford F150 temporarily fix the issue?

Resetting the code may temporarily clear the warning light, but the underlying problem with the throttle position sensor will still need to be addressed to prevent further issues.

10. Can a DIY enthusiast replace the throttle position sensor in a 2001 Ford F150?

Replacing the throttle position sensor can be a DIY project for those with mechanical skills and the necessary tools. However, it's recommended to consult a professional if unsure.

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