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P0720 2001 Ford F150 Code - Output Shaft Speed Sensor Circuit Malfunction

Quick Answer

The P0720 diagnostic trouble code (DTC) for a 2001 Ford F150 indicates a malfunction in the output shaft speed sensor circuit. Common causes include Damaged or corroded wiring connecting the sensor, Faulty output shaft speed sensor, Issues with the transmission control module. 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
P0720 2001 Ford F150 indicates Output Shaft Speed Sensor Circuit Malfunction.
Common causes
Common causes include Damaged or corroded wiring connecting the sensor, Faulty output shaft speed sensor, Issues with the transmission control module.
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 17, 2024
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Code P0720 2001 Ford F150 Description

The P0720 diagnostic trouble code (DTC) for a 2001 Ford F150 indicates a malfunction in the output shaft speed sensor circuit. The output shaft speed sensor is a vital component of the vehicle's transmission system, responsible for monitoring the speed of the output shaft. This information is crucial for the transmission control module to determine shift points and ensure smooth gear changes. When the output shaft speed sensor circuit malfunctions, it can lead to erratic shifting, poor performance, and potential damage to the transmission system.

OBDII Code P0720 2001 Ford F150 - Output Shaft Speed Sensor Circuit Malfunction
P0720 2001 Ford F150 Code - Output Shaft Speed Sensor Circuit Malfunction

Common Causes of P0720 2001 Ford F150

  1. Damaged or corroded wiring connecting the sensor
  2. Faulty output shaft speed sensor
  3. Issues with the transmission control module
  4. Poor electrical connection to the sensor
  5. Physical damage to the sensor or its mounting

Symptoms of P0720 2001 Ford F150

  1. Erratic shifting or slipping between gears
  2. Check engine light illuminated on the dashboard
  3. Harsh or delayed shifting
  4. Reduced fuel efficiency
  5. Transmission overheating

How to Fix P0720 2001 Ford F150

  1. Begin by diagnosing the issue using a scan tool to confirm the P0720 code and pinpoint the exact cause of the malfunction.
  2. Inspect the wiring harness and connections for any signs of damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test the output shaft speed sensor using a multimeter to check for proper resistance and signal output. Replace the sensor if it fails the test.
  4. Clear the DTC from the vehicle's computer using the scan tool and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the transmission control module or other related components.

Cost to Fix P0720 2001 Ford F150

The typical repair costs for addressing a P0720 code on a 2001 Ford F150 can vary depending on the specific cause of the issue. In general, replacing a faulty output shaft speed sensor can range from $100 to $200 for the part, with additional labor costs of approximately $100 to $200. However, if the issue is related to wiring or other components, the total repair cost could increase. It's important to consult with a qualified mechanic or repair shop to get an accurate estimate based on the specific diagnosis and required repairs. Keep in mind that labor rates can vary between different locations and types of repair facilities.

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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 P0720 2001 Ford F150 Code

1. What does code P0720 mean on a 2001 Ford F150?

Code P0720 indicates an Output Shaft Speed Sensor Circuit Malfunction, which means the vehicle's powertrain control module (PCM) is not receiving proper signals from the output shaft speed (OSS) sensor.

2. What are the symptoms of a P0720 code on a 2001 Ford F150?

Symptoms may include erratic or harsh shifting, the transmission staying in limp mode, inaccurate speedometer readings, and the check engine light being illuminated.

3. What causes a P0720 code on a 2001 Ford F150?

Common causes include a faulty OSS sensor, damaged wiring or connections in the OSS sensor circuit, a failed PCM, or transmission problems such as a worn-out gear or internal failure.

4. How do I diagnose a P0720 code on my Ford F150?

Start by checking the OSS sensor and its wiring for damage, corrosion, or loose connections. Use a multimeter to test the sensor for continuity and proper voltage. If the sensor and wiring are fine, scan the PCM for additional codes.

5. Can I drive my 2001 Ford F150 with a P0720 code?

While the truck may still be drivable, ignoring the issue can lead to erratic shifting, further damage to the transmission, or unsafe driving conditions. It’s best to address the problem promptly.

6. How do I fix a P0720 code on a 2001 Ford F150?

Repairs may include replacing the OSS sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or, in rare cases, replacing the PCM or addressing internal transmission issues.

7. Where is the output shaft speed sensor located on a 2001 Ford F150?

The OSS sensor is typically located on the transmission, near the output shaft or tail housing. Consult your vehicle's service manual for the exact location.

8. How much does it cost to fix a P0720 code on a Ford F150?

The cost varies depending on the repair. Replacing the OSS sensor typically ranges from $50 to $200, including parts and labor. Wiring or PCM repairs may cost more.

9. Can a dirty or low transmission fluid level cause a P0720 code?

While not a primary cause, dirty or low transmission fluid can contribute to transmission issues that may trigger related codes. Check and replace the fluid if needed.

10. Will clearing the P0720 code solve the problem?

Clearing the code without fixing the underlying issue may temporarily turn off the check engine light, but the code will likely return. Proper diagnosis and repair are necessary for a permanent fix.

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