AutoCodes – Ford – P0720 1999 Ford F150

P0720 1999 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 1999 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.

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Code Popularity 6,868

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 13, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0720 1999 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 1999 Ford F150 - Output Shaft Speed Sensor Circuit Malfunction - AutoCodes.com — P0720 1999 Ford F150 Code - Output Shaft Speed Sensor Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0720 1999 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 1999 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 1999 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.

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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 1999 Ford F150 Code

1. What are the common symptoms of OBDII code P0720 on a 1999 Ford F150?

The common symptoms of OBDII code P0720 on a 1999 Ford F150 include erratic speedometer readings, harsh shifting, and the transmission going into limp mode.

2. What can cause the Output Shaft Speed Sensor Circuit Malfunction on a 1999 Ford F150?

The Output Shaft Speed Sensor Circuit Malfunction (P0720) on a 1999 Ford F150 can be caused by a faulty speed sensor, damaged wiring or connectors, or issues with the transmission control module.

3. How can I diagnose OBDII code P0720 on my 1999 Ford F150?

To diagnose OBDII code P0720 on a 1999 Ford F150, you can use a scan tool to read the trouble code, inspect the speed sensor and its wiring for damage, and test the sensor's resistance and output voltage.

4. Can I still drive my 1999 Ford F150 with OBDII code P0720?

It is not recommended to drive your 1999 Ford F150 with OBDII code P0720 as it can lead to further damage to the transmission and affect the vehicle's performance.

5. How much does it cost to repair OBDII code P0720 on a 1999 Ford F150?

The cost to repair OBDII code P0720 on a 1999 Ford F150 can vary depending on the root cause of the issue, but it typically ranges from $200 to $500 for parts and labor.

6. Can a DIY enthusiast fix OBDII code P0720 on a 1999 Ford F150?

A DIY enthusiast with the necessary tools and knowledge of automotive repair may be able to fix OBDII code P0720 on a 1999 Ford F150 by replacing the speed sensor and addressing any wiring issues.

7. Will resetting the OBDII code P0720 on a 1999 Ford F150 make it go away?

Resetting the OBDII code P0720 on a 1999 Ford F150 may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the vehicle is driven again.

8. How long does it take to repair OBDII code P0720 on a 1999 Ford F150?

The repair time for OBDII code P0720 on a 1999 Ford F150 can vary depending on the extent of the issue, but it typically takes a few hours to a full day to diagnose and fix the problem.

9. Can OBDII code P0720 on a 1999 Ford F150 cause other problems if left untreated?

If left untreated, OBDII code P0720 on a 1999 Ford F150 can lead to transmission issues, reduced fuel efficiency, and potential damage to other components in the drivetrain.

10. How often does OBDII code P0720 occur in 1999 Ford F150 vehicles?

OBDII code P0720, indicating an Output Shaft Speed Sensor Circuit Malfunction, can occur in 1999 Ford F150 vehicles due to sensor or wiring issues, but it is not considered a common problem in this specific model year.