AutoCodesInfiniti – P1721 2005 Infiniti G35

P1721 2005 Infiniti G35 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 2005 Infiniti G35 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 2,792
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 12, 2019
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Code P1721 2005 Infiniti G35 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 2005 Infiniti G35 - Vehicle Speed Sensor MTR - AutoCodes.com
P1721 2005 Infiniti G35 Code - Vehicle Speed Sensor MTR

What are the Possible Causes of the DTC P1721 2005 Infiniti G35?

  • 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 2005 Infiniti G35?

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 2005 Infiniti G35 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 2005 Infiniti G35 code?

Need more information on how to fix the P1721 2005 Infiniti G35 code? Get Access to Factory Service Manuals

Need Help with the 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 P1721 2005 Infiniti G35 Code

1. What are the common symptoms of OBDII code P1721 in a 2005 Infiniti G35 related to the Vehicle Speed Sensor MTR?

- Common symptoms include erratic speedometer readings, harsh shifting, and the transmission going into limp mode.

2. What can cause OBDII code P1721 in a 2005 Infiniti G35?

- The code is usually triggered by a faulty vehicle speed sensor MTR, damaged wiring, or a failing transmission control module.

3. How can I diagnose the cause of OBDII code P1721 in my 2005 Infiniti G35?

- A diagnostic scan tool can help identify the specific issue by reading the code and checking the vehicle speed sensor's output signals.

4. Is it safe to continue driving with OBDII code P1721 in a 2005 Infiniti G35?

- It is not recommended to drive the vehicle with this code as it can lead to transmission issues and potential safety hazards.

5. Can I repair OBDII code P1721 in my 2005 Infiniti G35 on my own?

- If you have automotive repair experience and the necessary tools, you may be able to replace the vehicle speed sensor MTR yourself. However, professional diagnosis and repair are recommended.

6. How much does it typically cost to fix OBDII code P1721 in a 2005 Infiniti G35?

- The cost of repairing this code can vary depending on the root cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Are there any preventive maintenance tips to avoid OBDII code P1721 in a 2005 Infiniti G35?

- Regularly inspecting and maintaining the vehicle speed sensor MTR and its wiring can help prevent issues that trigger this code.

8. Can a faulty vehicle speed sensor MTR cause other problems in a 2005 Infiniti G35?

- Yes, a malfunctioning vehicle speed sensor MTR can also cause issues with the vehicle's ABS system and cruise control functionality.

9. Will resetting the OBDII code P1721 in a 2005 Infiniti G35 make it go away permanently?

- Resetting the code may temporarily clear the warning light, but it will return if the underlying issue causing the code is not addressed.

10. How long does it take to repair OBDII code P1721 in a 2005 Infiniti G35?

- The repair time can vary depending on the exact cause of the code, but it typically takes a few hours to replace the vehicle speed sensor MTR and perform necessary tests.

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