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Engine-Codes – Ford – P0720 1998 Ford F150

P0720 1998 Ford F150 Code - Output Shaft Speed Sensor Circuit Malfunction

Quick Answer

The P0720 code for a 1998 Ford F150 indicates a malfunction in the Output Shaft Speed Sensor Circuit. Common causes include Faulty output shaft speed sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or buildup on the sensor. 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 1998 Ford F150 indicates Output Shaft Speed Sensor Circuit Malfunction.
Common causes
Common causes include Faulty output shaft speed sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or buildup on the sensor.
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 Aug 25, 2024
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Code P0720 1998 Ford F150 Description

The P0720 code for a 1998 Ford F150 indicates a malfunction in the Output Shaft Speed Sensor Circuit. This sensor is responsible for monitoring the speed of the output shaft in the transmission. When this sensor malfunctions, it can lead to issues with the vehicle's transmission, causing erratic shifting, incorrect gear ratios, or even the transmission slipping. If not addressed, this issue can potentially cause further damage to the transmission system, leading to costly repairs in the long run. The underlying mechanics of this problem involve electrical components and sensor calibration within the transmission system.

OBDII Code P0720 1998 Ford F150 - Output Shaft Speed Sensor Circuit Malfunction
P0720 1998 Ford F150 Code - Output Shaft Speed Sensor Circuit Malfunction

Common Causes of P0720 1998 Ford F150

  1. Faulty output shaft speed sensor
  2. Damaged wiring or connectors in the sensor circuit
  3. Corrosion or buildup on the sensor
  4. Issues with the transmission control module
  5. Electrical problems within the transmission system

Symptoms of P0720 1998 Ford F150

  1. Erratic shifting or hesitation when changing gears
  2. Transmission slipping
  3. Incorrect gear ratios displayed on the dashboard
  4. Check Engine Light illuminated
  5. Reduced fuel efficiency

How to Fix P0720 1998 Ford F150

  1. Diagnose the specific cause of the code by using a scan tool to check for any additional related codes or performing a visual inspection of the sensor and wiring.
  2. Replace the output shaft speed sensor if it is found to be faulty.
  3. Check and repair any damaged wiring or connectors in the sensor circuit.
  4. Clear the trouble code from the vehicle's computer system and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnosis of the transmission control module or other electrical components may be necessary.

Cost to Fix P0720 1998 Ford F150

The typical repair costs for addressing a P0720 code on a 1998 Ford F150 can range from $150 to $400, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's recommended to obtain quotes from local auto repair shops for a more accurate estimate.

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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 1998 Ford F150 Code

1. What are the common symptoms of OBDII code P0720 on a 1998 Ford F150?

The common symptoms of OBDII code P0720 on a 1998 Ford F150 include issues with the vehicle's speedometer, erratic shifting, and the transmission going into limp mode.

2. What is the main cause of OBDII code P0720 on a 1998 Ford F150?

The main cause of OBDII code P0720 on a 1998 Ford F150 is a malfunction in the output shaft speed sensor circuit, which is responsible for monitoring the speed of the transmission output shaft.

3. How can I diagnose the output shaft speed sensor circuit on a 1998 Ford F150?

To diagnose the output shaft speed sensor circuit on a 1998 Ford F150, you can use a scan tool to check for the presence of OBDII code P0720 and perform a visual inspection of the sensor and its wiring for any signs of damage or disconnection.

4. Can I drive my 1998 Ford F150 with OBDII code P0720?

It is not recommended to drive your 1998 Ford F150 with OBDII code P0720, as it can lead to further damage to the transmission and potentially cause unsafe driving conditions due to erratic shifting or loss of speedometer functionality.

5. How do I repair OBDII code P0720 on my 1998 Ford F150?

To repair OBDII code P0720 on your 1998 Ford F150, you may need to replace the output shaft speed sensor, repair any damaged wiring in the circuit, or reset the trouble code with a scan tool after addressing the underlying issue.

6. Is it possible to reset OBDII code P0720 on a 1998 Ford F150 without fixing the underlying issue?

While you can reset OBDII code P0720 on a 1998 Ford F150 using a scan tool, it is important to address the underlying issue causing the malfunction in the output shaft speed sensor circuit to prevent the code from reappearing.

7. Can a faulty vehicle speed sensor cause OBDII code P0720 on a 1998 Ford F150?

Yes, a faulty vehicle speed sensor can potentially cause OBDII code P0720 on a 1998 Ford F150, as the output shaft speed sensor and the vehicle speed sensor are interconnected and work together to provide accurate speed data to the vehicle's systems.

8. Are there any DIY tips for troubleshooting OBDII code P0720 on a 1998 Ford F150?

Some DIY tips for troubleshooting OBDII code P0720 on a 1998 Ford F150 include checking the sensor's wiring for damage, ensuring proper connections, and testing the sensor's resistance with a multimeter to determine if it is faulty.

9. How much does it cost to repair OBDII code P0720 on a 1998 Ford F150?

The cost to repair OBDII code P0720 on a 1998 Ford F150 can vary depending on the cause of the issue and whether you choose to do the repair yourself or take it to a professional mechanic. Costs may include parts and labor.

10. Will OBDII code P0720 on a 1998 Ford F150 cause the check engine light to illuminate?

Yes, OBDII code P0720 on a 1998 Ford F150 will typically trigger the check engine light to illuminate on the dashboard, signaling that there is a malfunction in the output shaft speed sensor circuit that needs attention.

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