AutoCodes – Ford – P0721 2000 Ford F150

P0721 2000 Ford F150 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 2000 Ford F150 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 2,576

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 2000 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 out of range circuit.

OBDII Code P0721 2000 Ford F150 - Output Shaft Speed Sensor Range/Performance - AutoCodes.com — P0721 2000 Ford F150 Code - Output Shaft Speed Sensor Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0721 2000 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 P0721 2000 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 P0721 2000 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 P0721 2000 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 P0721 2000 Ford F150 Code

What does the OBDII code P0721 mean on a 2000 Ford F150?

The P0721 code indicates a problem with the Output Shaft Speed Sensor, specifically a range or performance issue that affects how the transmission calculates vehicle speed.

What are common symptoms of the P0721 code on a 2000 Ford F150?

Common symptoms include erratic or delayed shifting, the speedometer not working correctly, poor fuel efficiency, and the Check Engine Light being illuminated.

What causes the P0721 code to appear on a 2000 Ford F150?

Common causes include a faulty Output Shaft Speed Sensor, damaged sensor wiring or connectors, transmission fluid issues, or internal transmission problems.

How can I fix the P0721 code on my 2000 Ford F150?

Inspect and replace the Output Shaft Speed Sensor if faulty, check and repair any damaged wiring or connectors, and ensure the transmission fluid is clean and at the correct level.

Where is the Output Shaft Speed Sensor located on a 2000 Ford F150?

The Output Shaft Speed Sensor is typically located on the transmission tailshaft housing and monitors the rotational speed of the output shaft.

Can a faulty Output Shaft Speed Sensor damage the transmission on a 2000 Ford F150?

While a faulty sensor itself may not directly damage the transmission, it can cause improper shifting and increased wear on transmission components over time.

Is it safe to drive with the P0721 code on a 2000 Ford F150?

Driving with this code is not recommended as it can lead to erratic shifting, reduced performance, and potential transmission damage if left unaddressed.

How much does it cost to fix the P0721 code on a 2000 Ford F150?

The cost can vary, but replacing the Output Shaft Speed Sensor typically costs $100-$300, including parts and labor, depending on the repair shop.

Can low transmission fluid cause the P0721 code on a 2000 Ford F150?

Yes, low or dirty transmission fluid can affect the performance of the Output Shaft Speed Sensor and trigger the P0721 code.

How do I diagnose the P0721 code on a 2000 Ford F150?

Use an OBDII scanner to confirm the code, inspect the Output Shaft Speed Sensor and wiring for damage, check the transmission fluid level, and test the sensorâ€™s functionality with a multimeter.