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P1720 2008 Nissan Altima Sedan Code - Vehicle Speed Meter Circuit Malfunction

Quick Answer

When the diagnostic trouble code P1720 appears on a 2008 Nissan Altima Sedan, it indicates a malfunction in the vehicle speed meter circuit. Common causes include Faulty vehicle speed sensor, Damaged wiring or connectors in the speed meter circuit, Issues with the vehicle's computer system. 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 2008 Nissan Altima Sedan indicates Vehicle Speed Meter Circuit Malfunction.
Common causes
Common causes include Faulty vehicle speed sensor, Damaged wiring or connectors in the speed meter circuit, Issues with the vehicle's computer system.
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 11, 2024
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Code P1720 2008 Nissan Altima Sedan Description

When the diagnostic trouble code P1720 appears on a 2008 Nissan Altima Sedan, it indicates a malfunction in the vehicle speed meter circuit. The vehicle speed meter circuit is responsible for accurately measuring the speed of the vehicle and relaying this information to the vehicle's onboard computer system. This code can affect the vehicle's performance by causing inaccurate speed readings, which can lead to issues with the transmission, fuel efficiency, and overall drivability of the vehicle.

OBDII Code P1720 2008 Nissan Altima Sedan - Vehicle Speed Meter Circuit Malfunction
P1720 2008 Nissan Altima Sedan Code - Vehicle Speed Meter Circuit Malfunction

Common Causes of P1720 2008 Nissan Altima Sedan

  1. Faulty vehicle speed sensor
  2. Damaged wiring or connectors in the speed meter circuit
  3. Issues with the vehicle's computer system
  4. Corrosion or debris in the speed sensor
  5. Electrical interference or short circuits

Symptoms of P1720 2008 Nissan Altima Sedan

  1. Inaccurate speedometer readings
  2. Erratic or fluctuating speedometer needle
  3. Check Engine Light illuminated
  4. Transmission shifting issues
  5. Loss of fuel efficiency

How to Fix P1720 2008 Nissan Altima Sedan

  1. Perform a diagnostic scan to confirm the P1720 code and identify the specific cause of the issue.
  2. Inspect the vehicle speed sensor and wiring for any damage or corrosion. Replace any faulty components.
  3. Clear the trouble code from the vehicle's computer system and test drive the vehicle to ensure the issue is resolved.
  4. If the problem persists, further diagnostics may be necessary to pinpoint the exact cause of the malfunction.
  5. Once the root cause is identified, repair or replace the affected components as needed to correct the issue.

Cost to Fix P1720 2008 Nissan Altima Sedan

The typical repair costs for addressing a P1720 code on a 2008 Nissan Altima Sedan can range from $150 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing.

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 2008 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P1720 on a 2008 Nissan Altima Sedan?

- Common symptoms include erratic speedometer readings, inoperative speedometer, and illuminated warning lights on the dashboard.

2. What could cause the OBDII code P1720 on a 2008 Nissan Altima Sedan?

- The code P1720 typically indicates a malfunction in the vehicle speed meter circuit, which could be caused by a faulty speed sensor, damaged wiring, or a defective instrument cluster.

3. How can I diagnose the OBDII code P1720 on my 2008 Nissan Altima Sedan?

- Diagnosis involves checking the vehicle speed sensor, inspecting the wiring harness for any damage, and testing the instrument cluster for proper functionality using a diagnostic scanner.

4. Are there any DIY repair tips for fixing the vehicle speed meter circuit malfunction on a 2008 Nissan Altima Sedan?

- DIY repair tips include checking and cleaning the speed sensor connectors, inspecting the wiring for any visible damage, and resetting the trouble code using an OBDII scanner after making any necessary repairs.

5. Can driving with the OBDII code P1720 on a 2008 Nissan Altima Sedan cause any further damage?

- Driving with the P1720 code may result in inaccurate speedometer readings, which can affect the vehicle's performance and fuel efficiency. It is recommended to address the issue promptly to prevent any potential damage.

6. Is it safe to continue driving my 2008 Nissan Altima Sedan with the vehicle speed meter circuit malfunction?

- It is generally safe to drive the vehicle with the code P1720, but it is important to address the underlying issue to ensure accurate speedometer readings and proper vehicle operation.

7. How much does it typically cost to repair the OBDII code P1720 on a 2008 Nissan Altima Sedan?

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

8. Can a DIY enthusiast without much experience fix the OBDII code P1720 on a 2008 Nissan Altima Sedan?

- While some DIY enthusiasts may be able to address the issue with basic tools and knowledge, it is recommended to consult a professional mechanic for a proper diagnosis and repair to avoid any further complications.

9. Will resetting the OBDII code P1720 on a 2008 Nissan Altima Sedan make the issue go away permanently?

- Resetting the code may temporarily turn off the warning light, but if the underlying issue is not resolved, the code is likely to reappear. It is crucial to diagnose and fix the root cause of the problem.

10. How long does it typically take to repair the vehicle speed meter circuit malfunction associated with the OBDII code P1720 on a 2008 Nissan Altima Sedan?

- The repair time can vary depending on the cause of the issue and the availability of parts, but it may take a few hours to a day for a professional mechanic to diagnose and fix the problem.

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