AutoCodes – Infiniti – P1721 2004 Infiniti G35

P1721 2004 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 2004 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 2,356

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 2004 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 2004 Infiniti G35 - Vehicle Speed Sensor MTR - AutoCodes.com — P1721 2004 Infiniti G35 Code - Vehicle Speed Sensor MTR

What does this mean?

What are the Possible Causes of the DTC P1721 2004 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 2004 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 2004 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 2004 Infiniti G35 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 2004 Infiniti G35 Code

1. What are the common symptoms of OBDII code P1721 on a 2004 Infiniti G35 related to the Vehicle Speed Sensor MTR?

The common symptoms include erratic speedometer readings, incorrect shifting of gears, and the illumination of the Check Engine Light.

2. What does OBDII code P1721 on a 2004 Infiniti G35 indicate about the Vehicle Speed Sensor MTR?

This code indicates a malfunction or fault in the vehicle speed sensor motor circuit.

3. What are the possible causes of OBDII code P1721 on a 2004 Infiniti G35?

Possible causes include a faulty vehicle speed sensor, damaged wiring or connectors in the speed sensor circuit, or a defective speed sensor motor.

4. How can I diagnose the issue causing OBDII code P1721 on my 2004 Infiniti G35?

Diagnosis involves checking the vehicle speed sensor for proper operation, inspecting the wiring and connectors for damage, and testing the speed sensor motor circuit for continuity.

5. Can I continue to drive my 2004 Infiniti G35 with OBDII code P1721 present?

It is not recommended to continue driving with this code present, as it can lead to further damage to the vehicle's transmission system.

6. How can I repair OBDII code P1721 on a 2004 Infiniti G35 related to the Vehicle Speed Sensor MTR?

Repair involves replacing the faulty vehicle speed sensor, repairing any damaged wiring or connectors, or addressing any issues with the speed sensor motor.

7. Is it possible to reset OBDII code P1721 on a 2004 Infiniti G35 without fixing the underlying issue?

While it is possible to clear the code temporarily, it will likely reappear until the root cause of the problem is addressed.

8. Will OBDII code P1721 on a 2004 Infiniti G35 cause any long-term damage if left unresolved?

Leaving this code unresolved can potentially lead to transmission issues, inaccurate speed readings, and other related problems, which may result in costly repairs.

9. How much does it typically cost to repair OBDII code P1721 on a 2004 Infiniti G35 at a professional mechanic or dealership?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500 or more, including parts and labor.

10. Can I fix OBDII code P1721 on a 2004 Infiniti G35 myself, or should I seek professional help?

While some experienced DIYers may be able to tackle this repair themselves, it is recommended to seek professional help, especially if you are not familiar with automotive electrical systems.