AutoCodes – Generic – P0721

P0721 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 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 38,147

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
Comments
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Code P0721 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 - Output Shaft Speed Sensor Range/Performance - AutoCodes.com — P0721 Code - Output Shaft Speed Sensor Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0721?

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?

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 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 code?

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Information for Specific Makes

P0721 Acura — Output Shaft Speed Sensor Range/Performance
P0721 Audi — Output Speed Sensor Range/Performance
P0721 BMW — Output Speed Sensor Range/Performance
P0721 Buick — Transmission Output Speed Sensor Performance
P0721 Cadillac — Transmission Output Speed Sensor Performance
P0721 Chevrolet — Transmission Output Speed Sensor Performance
P0721 Chrysler — Output Speed Sensor Circuit Performance
P0721 Dodge — Output Speed Sensor Circuit Performance
P0721 Ford — Output Shaft Speed Sensor Range/Performance
P0721 GMC — Transmission Output Speed Sensor Performance
P0721 Honda — Output Shaft Speed Sensor Range/Performance
P0721 Hyundai — Output Speed Sensor Range/Performance
P0721 Jaguar — Output Shaft Speed Sensor Range/Performance
P0721 Jeep — Output Speed Sensor Circuit Performance
P0721 KIA — Vehicle Speed Sensor 1
P0721 Lincoln — Output Shaft Speed Sensor Range/Performance
P0721 Mazda — Erratic Output Shaft Speed
P0721 Mercedes-Benz — Output Speed Sensor Range/Performance
P0721 Mercury — Output Shaft Speed Sensor Range/Performance
P0721 MINI — Output Speed Sensor Range/Performance
P0721 Mitsubishi — Output Speed Sensor Performance
P0721 Suzuki — Output Speed Sensor Range/Performance
P0721 Volkswagen — Output Speed Sensor Range/Performance

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.