AutoCodes – Nissan – P1721 Nissan

P1721 Nissan Code - Vehicle Speed Sensor MTR

Quick Answer

The vehicle speed sensor·MTR signal is transmitted from combination meter to Transmission Control Module (TCM) by CAN communication line. Common causes include Faulty Vehicle Speed Sensor, Vehicle Speed Sensor harness is open or shorted, Vehicle 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: P1721 Nissan indicates Vehicle Speed Sensor MTR.
Common causes: Common causes include Faulty Vehicle Speed Sensor, Vehicle Speed Sensor harness is open or shorted, Vehicle 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 25,421

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 Sep 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1721 Nissan Description

The vehicle speed sensor·MTR signal is transmitted from combination meter to Transmission Control Module (TCM) by CAN communication line. The signal functions as an auxiliary device to the revolution sensor when it is malfunctioning. The TCM will then use the vehicle speed sensor·MTR signal.

OBDII Code P1721 Nissan - Vehicle Speed Sensor MTR - AutoCodes.com — P1721 Nissan Code - Vehicle Speed Sensor MTR

What does this mean?

What are the Possible Causes of the DTC P1721 Nissan?

Faulty Vehicle Speed Sensor
Vehicle Speed Sensor harness is open or shorted
Vehicle Speed Sensor circuit poor electrical connection
Transmission Control Module (TCM) communication

How to Fix the DTC P1721 Nissan?

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 P1721 Nissan 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 P1721 Nissan code?

Need more information on how to fix the P1721 Nissan code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1721 Nissan code diagnosed by a professional: Find a repair shop in your area

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 P1721 Nissan Code

1. What are the common symptoms of OBDII code P1721 (Nissan) related to the Vehicle Speed Sensor MTR?

Common symptoms include erratic speedometer readings, incorrect shifting patterns, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P1721 (Nissan) related to the Vehicle Speed Sensor MTR?

Potential causes include a faulty vehicle speed sensor, damaged wiring or connectors, issues with the speedometer, or a malfunctioning transmission control module.

3. How can I diagnose the cause of OBDII code P1721 (Nissan) related to the Vehicle Speed Sensor MTR?

Diagnosis typically involves conducting a visual inspection of the vehicle speed sensor and its wiring, testing the sensor's output voltage, and using a scan tool to check for related trouble codes.

4. What are the repair options for OBDII code P1721 (Nissan) related to the Vehicle Speed Sensor MTR?

Repair options may include replacing the vehicle speed sensor, repairing damaged wiring or connectors, recalibrating the speedometer, or reprogramming the transmission control module.

5. Can I continue driving my vehicle with OBDII code P1721 (Nissan) related to the Vehicle Speed Sensor MTR?

It is not recommended to continue driving your vehicle with this code as it can lead to transmission issues and potential safety hazards. It is best to address the problem promptly.

6. How much does it typically cost to repair OBDII code P1721 (Nissan) related to the Vehicle Speed Sensor MTR?

The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Are there any DIY tips for troubleshooting OBDII code P1721 (Nissan) related to the Vehicle Speed Sensor MTR?

DIY tips may include checking the sensor's wiring for damage, ensuring proper sensor alignment, and using a multimeter to test for continuity and voltage output.

8. Can a faulty vehicle speed sensor cause other issues besides triggering OBDII code P1721 (Nissan) related to the Vehicle Speed Sensor MTR?

Yes, a faulty vehicle speed sensor can also cause issues with cruise control, ABS systems, and overall vehicle performance.

9. How long does it typically take to repair OBDII code P1721 (Nissan) related to the Vehicle Speed Sensor MTR?

The repair time can vary depending on the exact cause of the issue, but it may take anywhere from 1 to 3 hours to complete the repair.

10. Is it necessary to visit a dealership for repairs related to OBDII code P1721 (Nissan) Vehicle Speed Sensor MTR?

While visiting a dealership is an option, independent auto repair shops and skilled DIY enthusiasts can also effectively diagnose and repair issues related to this code.