AutoCodes – MINI – P0721 MINI

P0721 MINI Code - Output Speed Sensor Range/Performance

Quick Answer

The speed sensor detects the revolution of the idler gear parking pawl lock gear and emits a pulse signal. Common causes include Faulty Speed Sensor, Speed Sensor harness is open or shorted, 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 MINI indicates Output Speed Sensor Range/Performance.
Common causes: Common causes include Faulty Speed Sensor, Speed Sensor harness is open or shorted, 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 7,498

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0721 MINI Description

The speed sensor detects the revolution of the idler gear parking pawl lock gear and emits a pulse signal. The pulse signal is sent to the Transmission Control Module (TCM) which converts it into vehicle speed.

OBDII Code P0721 MINI - Output Speed Sensor Range/Performance - AutoCodes.com — P0721 MINI Code - Output Speed Sensor Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0721 MINI?

Faulty Speed Sensor
Speed Sensor harness is open or shorted
Speed Sensor circuit poor electrical connection

How to Fix the DTC P0721 MINI?

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 MINI 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 MINI Code

1. What are common symptoms of OBDII code P0721 in a MINI related to the output speed sensor?

The common symptoms include erratic shifting, harsh shifting, delayed shifting, and the transmission going into limp mode.

2. What are the potential causes of OBDII code P0721 in a MINI?

The potential causes may include a faulty output speed sensor, damaged wiring or connectors, low transmission fluid level, or internal transmission issues.

3. How can I diagnose the cause of OBDII code P0721 in my MINI?

Diagnosing the issue involves conducting a thorough inspection of the output speed sensor, checking the wiring and connectors for damage, ensuring the transmission fluid level is correct, and performing a scan tool test.

4. Can I continue driving my MINI with OBDII code P0721 present?

It's not recommended to drive the vehicle with code P0721 as it can lead to further damage to the transmission. It's best to address the issue promptly.

5. How can I repair OBDII code P0721 in my MINI?

Repairing the issue involves replacing the faulty output speed sensor, repairing any damaged wiring or connectors, ensuring the transmission fluid level is correct, and resetting the trouble code.

6. Are there any DIY tips for fixing OBDII code P0721 in a MINI?

While some aspects of diagnosing and repairing the issue can be done by DIY enthusiasts, it's recommended to consult a professional mechanic for accurate diagnosis and proper repair.

7. How much does it cost to repair OBDII code P0721 in a MINI?

The cost of repair can vary depending on the exact cause of the issue, the cost of parts, and labor rates. It's best to get a few quotes from different mechanics to compare prices.

8. Can a faulty output speed sensor cause other transmission issues in a MINI?

Yes, a faulty output speed sensor can cause other transmission issues such as incorrect shifting patterns, poor performance, and potential damage to other transmission components.

9. How long does it take to repair OBDII code P0721 in a MINI?

The repair time can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a full day to complete the repair.

10. Is it necessary to clear the trouble code after repairing OBDII code P0721 in a MINI?

Yes, it's important to clear the trouble code using a scan tool after repairing OBDII code P0721 to ensure the issue has been resolved and to prevent the check engine light from coming back on.