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Engine-Codes – Nissan – P1720 2009 Nissan Altima Sedan

P1720 2009 Nissan Altima Sedan Code - Vehicle Speed Meter Circuit Malfunction

Quick Answer

The P1720 code for a 2009 Nissan Altima Sedan indicates a malfunction in the vehicle speed meter circuit. Common causes include Faulty speed sensor, Damaged wiring or connectors in the speed meter circuit, Malfunctioning instrument cluster. 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
P1720 2009 Nissan Altima Sedan indicates Vehicle Speed Meter Circuit Malfunction.
Common causes
Common causes include Faulty speed sensor, Damaged wiring or connectors in the speed meter circuit, Malfunctioning instrument cluster.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P1720 2009 Nissan Altima Sedan Description

The P1720 code for a 2009 Nissan Altima Sedan indicates a malfunction in the vehicle speed meter circuit. This means that there is an issue with the system responsible for measuring and displaying the vehicle's speed. The vehicle speed meter, also known as the speedometer, is an essential component for providing the driver with real-time information about the vehicle's speed. When this circuit malfunctions, it can lead to inaccurate speed readings or a complete failure of the speedometer.

OBDII Code P1720 2009 Nissan Altima Sedan - Vehicle Speed Meter Circuit Malfunction
P1720 2009 Nissan Altima Sedan Code - Vehicle Speed Meter Circuit Malfunction

Common Causes of P1720 2009 Nissan Altima Sedan

  1. Faulty speed sensor
  2. Damaged wiring or connectors in the speed meter circuit
  3. Malfunctioning instrument cluster
  4. Issues with the vehicle's ECM
  5. Corrosion or debris affecting the speed sensor

Symptoms of P1720 2009 Nissan Altima Sedan

  1. Inaccurate speed readings on the speedometer
  2. Speedometer needle fluctuating or sticking
  3. ABS warning light illuminated on the dashboard
  4. Cruise control not functioning properly
  5. Transmission shifting irregularly

How to Fix P1720 2009 Nissan Altima Sedan

  1. Diagnose the issue using a scan tool to retrieve the trouble code and perform a visual inspection of the speed sensor, wiring, and connectors.
  2. Test the speed sensor's output signal using a multimeter to determine if it is functioning correctly.
  3. Replace the speed sensor if it is found to be faulty, ensuring proper installation and connection.
  4. Check and repair any damaged wiring or connectors in the speed meter circuit.
  5. Clear the trouble code from the vehicle's ECM and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P1720 2009 Nissan Altima Sedan

The typical repair costs for addressing a P1720 code in a 2009 Nissan Altima Sedan can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor. This estimate includes the price of a new speed sensor, any necessary wiring or connector repairs, and the labor involved in diagnosing and repairing the problem. It's important to note that the actual cost may vary based on the location of the repair shop, the vehicle's make and model, and the extent of the repairs needed. Additionally, the specific diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. It is recommended to obtain a detailed quote from a trusted mechanic or repair shop to determine the precise cost of addressing this issue.

When is the Code Detected?

Malfunction is detected when ECM detects a difference between two vehicle speed sensor signals is out of the specified range.

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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 P1720 2009 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P1720 on a 2009 Nissan Altima Sedan?

Possible symptoms include erratic speedometer readings, inoperative speedometer, ABS warning light illuminated, and transmission shifting issues.

2. What does the OBDII code P1720 indicate for a 2009 Nissan Altima Sedan?

The code P1720 indicates a malfunction in the vehicle speed meter circuit, which is responsible for transmitting speed data to the vehicle's onboard computer.

3. What are some possible causes of the OBDII code P1720 on a 2009 Nissan Altima Sedan?

Common causes of the P1720 code include faulty vehicle speed sensor, damaged wiring or connectors in the speed sensor circuit, or a malfunctioning speedometer gauge.

4. How can I diagnose the OBDII code P1720 on my 2009 Nissan Altima Sedan?

Diagnosing the P1720 code involves checking the vehicle speed sensor for proper operation, inspecting the wiring and connectors for damage, and using a scan tool to read live data from the speed sensor.

5. Can I continue driving my 2009 Nissan Altima Sedan with the OBDII code P1720?

It is not recommended to drive the vehicle with the P1720 code present, as it can lead to inaccurate speedometer readings and potential transmission issues. It is best to address the problem promptly.

6. How can I repair the OBDII code P1720 on my 2009 Nissan Altima Sedan?

Repairing the P1720 code typically involves replacing a faulty vehicle speed sensor, repairing damaged wiring or connectors, or recalibrating the speedometer gauge as needed.

7. Will resetting the OBDII code P1720 on my 2009 Nissan Altima Sedan fix the issue?

Resetting the code may temporarily clear the warning light, but if the underlying issue causing the P1720 code is not addressed, the problem is likely to recur. Proper diagnosis and repair are recommended.

8. Can a DIY enthusiast fix the OBDII code P1720 on a 2009 Nissan Altima Sedan?

Depending on the cause of the P1720 code, some DIY enthusiasts may be able to tackle the repair themselves, especially if it involves replacing the vehicle speed sensor or repairing wiring. However, proper diagnosis is crucial.

9. How much does it cost to repair the OBDII code P1720 on a 2009 Nissan Altima Sedan?

The cost of repairing the P1720 code can vary depending on the cause of the issue, labor rates in your area, and whether you choose to do the repair yourself or take it to a professional mechanic. Estimates can range from $100 to $300 or more.

10. Is the OBDII code P1720 a common issue in 2009 Nissan Altima Sedans?

While the P1720 code may not be as common as some other OBDII codes, issues with the vehicle speed meter circuit can occur in 2009 Nissan Altima Sedans due to sensor failures, wiring problems, or other factors.

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