AutoCodes – Ford – P0720 1998 Ford F150

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

Quick Answer

The Output Shaft Speed (OSS) Sensor provides the Powertrain Control Module (PCM) with information about the rotational speed of an output shaft. Common causes include Faulty Output Speed Sensor (OSS), Output Speed Sensor harness is open or shorted, Output Speed 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
P0720 1998 Ford F150 indicates Output Shaft Speed Sensor Circuit Malfunction.
Common causes
Common causes include Faulty Output Speed Sensor (OSS), Output Speed Sensor harness is open or shorted, Output Speed 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 5,172
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 13, 2020
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Code P0720 1998 Ford F150 Description

The Output Shaft Speed (OSS) Sensor provides the Powertrain Control Module (PCM) with information about the rotational speed of an output shaft. The PCM uses the information to control and diagnose powertrain behavior. In some applications, the sensor is also used as the source of vehicle speed. The sensor may be physically located in different places on the vehicle, depending upon the specific application. The design of each speed sensor is unique and depends on which powertrain control feature uses the information that is generated. The Diagnostic Trouble Code (DTC) will set if the PCM detects an OSS sensor circuit malfunction.
OBDII Code P0720 1998 Ford F150 - Output Shaft Speed Sensor Circuit Malfunction - AutoCodes.com
P0720 1998 Ford F150 Code - Output Shaft Speed Sensor Circuit Malfunction

What are the Possible Causes of the DTC P0720 1998 Ford F150?

  • Faulty Output Speed Sensor (OSS)
  • Output Speed Sensor harness is open or shorted
  • Output Speed Sensor circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0720 1998 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0720 1998 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.

Need more information about the P0720 1998 Ford F150 code?

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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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