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P1120 Ford Code - Throttle Position Sensor Out of Range

Quick Answer

The P1120 Ford diagnostic trouble code indicates that the throttle position sensor (TPS) is out of range. Common causes include Faulty throttle position sensor, Wiring or connector issues, Dirty throttle body. 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 Ford indicates Throttle Position Sensor Out of Range.
Common causes
Common causes include Faulty throttle position sensor, Wiring or connector issues, Dirty throttle body.
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 06, 2024
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Code P1120 Ford Description

The P1120 Ford diagnostic trouble code indicates that the throttle position sensor (TPS) is out of range. The TPS is a sensor that monitors the position of the throttle valve, which regulates the amount of air entering the engine. When the TPS is out of range, it means that the sensor is providing incorrect data to the engine control module (ECM), leading to potential performance issues. This can result in poor fuel efficiency, rough idling, hesitation during acceleration, and even stalling. If left unaddressed, this issue can cause further damage to the engine and other components.

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

Common Causes of P1120 Ford

  1. Faulty throttle position sensor
  2. Wiring or connector issues
  3. Dirty throttle body
  4. Vacuum leaks
  5. ECM software issues

Symptoms of P1120 Ford

  1. Rough idling
  2. Poor fuel efficiency
  3. Hesitation during acceleration
  4. Engine stalling
  5. Check Engine Light illuminated

How to Fix P1120 Ford

  1. Diagnose the issue by using a scan tool to confirm the P1120 code and inspecting the throttle position sensor and related components.
  2. Replace the faulty throttle position sensor if necessary.
  3. Check and clean the throttle body to ensure proper airflow.
  4. Inspect and repair any damaged wiring or connectors.
  5. Reset the ECM and perform a throttle position sensor relearn procedure to calibrate the sensor.

Cost to Fix P1120 Ford

The cost of repairing a throttle position sensor out of range issue can vary depending on the specific vehicle make and model, as well as the labor rates in your area. Typically, the cost of replacing a throttle position sensor ranges from $100 to $300, including parts and labor. Additional costs may apply if other components need to be replaced or repaired. It is recommended to get a quote from a trusted auto repair shop to determine the exact cost for your vehicle.

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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Information for Specific Ford Models

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 Ford Code

1. What are the common symptoms of OBDII code P1120 in a Ford vehicle?

The common symptoms of P1120 include issues with acceleration, poor engine performance, stalling, and rough idling.

2. What does the OBDII code P1120 in a Ford indicate?

OBDII code P1120 indicates that the throttle position sensor is reporting a signal that is out of the expected range.

3. What are the possible causes of the OBDII code P1120 in a Ford related to the throttle position sensor?

Possible causes of P1120 include a faulty throttle position sensor, wiring issues, poor electrical connections, or a problem with the throttle body.

4. How can I diagnose the cause of the OBDII code P1120 in my Ford related to the throttle position sensor?

Diagnosing P1120 involves checking the throttle position sensor's wiring and connections, testing the sensor's voltage output, and ensuring proper throttle body operation.

5. Can a dirty throttle body cause the OBDII code P1120 in a Ford?

Yes, a dirty throttle body can cause incorrect readings from the throttle position sensor, leading to the triggering of code P1120.

6. What are some repair tips for addressing the OBDII code P1120 in a Ford related to the throttle position sensor?

Repair tips include cleaning the throttle body, inspecting and repairing wiring issues, testing the throttle position sensor, and replacing any faulty components.

7. Is it safe to continue driving with the OBDII code P1120 in a Ford triggered?

It is not recommended to continue driving with code P1120 active, as it can lead to further engine performance issues and potential safety concerns.

8. How much does it typically cost to repair the OBDII code P1120 in a Ford at a mechanic or dealership?

The cost of repairing P1120 can vary depending on the exact cause, but it may range from $100 to $300 for parts and labor.

9. Can I reset the OBDII code P1120 in my Ford using an OBDII scanner?

Yes, you can reset the code using an OBDII scanner, but it is important to address the underlying issue causing the code to prevent it from recurring.

10. Will the OBDII code P1120 in a Ford cause the Check Engine Light to illuminate?

Yes, code P1120 will typically trigger the Check Engine Light to illuminate on the dashboard of your Ford vehicle.

Discuss the causes and fixes for P1120 Ford OBDII Code

Submit a New Comment

  • I replaced the tps on a friends 2001 focus after I was told that the code came up that it was bad. Now the check engine light has come back on and the code says tps out of range.

    Reply to Comment

  • had a P0122 on my 2003 ford focus ZTW 2.0l sohc ztec. replaced the TPS and now i have a P1120 code. ????

    Reply to Comment

    • The P1120 - Throttle Position Sensor (TPS) Out of Range code indicates that the Engine Control Module (ECM) is detecting a TPS signal that is outside the expected range, even after you've replaced the sensor. Since you initially had a P0122 (TPS Low Voltage) code, it seems the issue might not be the sensor itself but rather wiring, installation, or calibration. Here's what you should check:

      Possible Causes and Solutions:

      1. Throttle Position Sensor Calibration (if applicable):

        • On some vehicles, the ECM may require a TPS recalibration or throttle position relearn procedure after replacing the sensor.
        • Relearn Procedure (if your model supports it):
          1. Disconnect the battery for about 10 minutes.
          2. Reconnect the battery.
          3. Turn the ignition to "ON" (without starting the engine) and press the accelerator pedal fully, then release it slowly.
          4. Start the engine and let it idle for a few minutes.

      2. Check TPS Wiring and Connectors:

        • Inspect the wiring harness and connector leading to the TPS for damage, corrosion, or loose connections.
        • Ensure the connector is securely attached to the new TPS.
        • Use a multimeter to check for proper voltage and ground at the TPS connector:
          • Reference Voltage (usually 5V from the ECM).
          • Signal Voltage should change smoothly as the throttle opens (typically between 0.5V and 4.5V).

      3. Inspect for Incorrect Sensor Installation:

        • Ensure the TPS is installed correctly and aligned with the throttle shaft.
        • Some TPS sensors need to be rotated into position during installation to ensure proper alignment with the throttle.

      4. Throttle Body or ECM Issue:

        • If the throttle body is dirty, damaged, or sticking, it can cause the TPS signal to be out of range.
        • In rare cases, the ECM may have a fault or require reprogramming.

      5. Double-Check the Sensor Compatibility:

        • Verify that the replacement TPS is the correct part for your 2003 Ford Focus ZTW 2.0L SOHC engine. An incorrect or incompatible sensor can trigger out-of-range codes.

      Next Steps:

      1. Perform a visual inspection and test the TPS wiring and voltage signals.
      2. Try a battery disconnect and throttle relearn procedure.
      3. If the problem persists, use an OBDII scanner to monitor live data from the TPS to see if the signal is erratic or stuck outside the normal range.

      By following these steps, you should be able to diagnose and resolve the P1120 code. Let us know how it goes!

      Reply to Comment