AutoCodes – Ford – P0721 2010 Ford Fusion

P0721 2010 Ford Fusion Code - Output Shaft Speed Sensor Range/Performance

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: P0721 2010 Ford Fusion indicates Output Shaft Speed Sensor Range/Performance.
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 3,561

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
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0721 2010 Ford Fusion 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 out of range circuit.

OBDII Code P0721 2010 Ford Fusion - Output Shaft Speed Sensor Range/Performance - AutoCodes.com — P0721 2010 Ford Fusion Code - Output Shaft Speed Sensor Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0721 2010 Ford Fusion?

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 P0721 2010 Ford Fusion?

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 P0721 2010 Ford Fusion 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 P0721 2010 Ford Fusion Code

1. What does the OBDII code P0721 mean on a 2010 Ford Fusion?

P0721 indicates an issue with the Output Shaft Speed Sensor (OSS), specifically a range or performance problem detected by the vehicle's powertrain control module (PCM).

2. What are the symptoms of a P0721 code in a 2010 Ford Fusion?

Common symptoms include erratic shifting, transmission slipping, the speedometer not working properly, reduced fuel efficiency, and the check engine light being illuminated.

3. What causes the P0721 code to appear on a 2010 Ford Fusion?

Possible causes include a faulty output shaft speed sensor, damaged wiring or connectors, a malfunctioning PCM, or internal transmission issues.

4. Can I drive my 2010 Ford Fusion with a P0721 code?

Driving with a P0721 code is not recommended, as it can cause further transmission damage or unsafe driving conditions due to erratic shifting.

5. How do I fix the P0721 code on a 2010 Ford Fusion?

Repairs may include replacing the output shaft speed sensor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.

6. Where is the output shaft speed sensor located on a 2010 Ford Fusion?

The output shaft speed sensor is typically mounted on the transmission near the output shaft.

7. How much does it cost to fix the P0721 code on a 2010 Ford Fusion?

Repair costs can vary but generally range from $150 to $400, depending on whether the sensor, wiring, or PCM needs repair or replacement.

8. Can a dirty or contaminated transmission fluid cause a P0721 code?

Yes, contaminated or low transmission fluid can affect the operation of the speed sensor or transmission components, potentially triggering the P0721 code.

9. Will clearing the P0721 code with an OBDII scanner fix the issue?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be diagnosed and repaired to prevent the code from returning.

10. How is the P0721 code diagnosed on a 2010 Ford Fusion?

A mechanic will typically inspect the speed sensor, wiring, and connectors, check the transmission fluid, and use a scan tool to monitor real-time data from the output shaft speed sensor.