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P0720 1999 Infiniti G20 Code - Vehicle Speed Sensor

Quick Answer

The P0720 code in a 1999 Infiniti G20 indicates a malfunction in the vehicle speed sensor circuit. Common causes include Faulty vehicle speed sensor: The sensor itself may be faulty and need to be replaced, Damaged wiring or connectors: The wiring or connectors connected to the vehicle speed sensor may be damaged or corroded, Sensor alignment: Improper alignment or installation of the sensor can cause it to malfunction. 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
P0720 1999 Infiniti G20 indicates Vehicle Speed Sensor.
Common causes
Common causes include Faulty vehicle speed sensor: The sensor itself may be faulty and need to be replaced, Damaged wiring or connectors: The wiring or connectors connected to the vehicle speed sensor may be damaged or corroded, Sensor alignment: Improper alignment or installation of the sensor can cause it to malfunction.
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 14, 2024
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Code P0720 1999 Infiniti G20 Description

The P0720 code in a 1999 Infiniti G20 indicates a malfunction in the vehicle speed sensor circuit. The vehicle speed sensor, also known as the VSS, is a crucial component that monitors the speed of the vehicle and sends this information to the engine control module (ECM). The ECM uses this data to adjust various systems in the vehicle, such as the transmission, fuel injection, and ABS. When the vehicle speed sensor fails or malfunctions, it can lead to a variety of performance issues and potentially cause long-term damage to the vehicle.

OBDII Code P0720 1999 Infiniti G20 - Vehicle Speed Sensor
P0720 1999 Infiniti G20 Code - Vehicle Speed Sensor

Common Causes of P0720 1999 Infiniti G20

  1. Faulty vehicle speed sensor: The sensor itself may be faulty and need to be replaced.
  2. Damaged wiring or connectors: The wiring or connectors connected to the vehicle speed sensor may be damaged or corroded.
  3. Sensor alignment: Improper alignment or installation of the sensor can cause it to malfunction.
  4. ECM issues: Problems with the engine control module can also trigger the P0720 code.
  5. Vehicle speed sensor reluctor ring: Damage to the reluctor ring that the sensor reads from can cause issues with speed sensor readings.

Symptoms of P0720 1999 Infiniti G20

  1. Inaccurate speedometer readings: The speedometer may fluctuate or show incorrect speeds.
  2. Harsh shifting: The transmission may shift erratically or harshly.
  3. Loss of power: The vehicle may experience a loss of power or acceleration.
  4. ABS light: The ABS light may illuminate on the dashboard.
  5. Check Engine Light: The Check Engine Light may come on, indicating a problem with the vehicle speed sensor.

How to Fix P0720 1999 Infiniti G20

  1. Diagnose the issue: Use a scan tool to read the code and determine if the vehicle speed sensor is the root cause of the problem.
  2. Locate the sensor: The vehicle speed sensor is typically located on the transmission or differential.
  3. Replace the sensor: Remove the old sensor and install a new one, ensuring proper alignment and connection.
  4. Check wiring: Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as needed.
  5. Clear the code: After replacing the sensor and addressing any wiring issues, clear the code with a scan tool to reset the Check Engine Light.

Cost to Fix P0720 1999 Infiniti G20

The cost of repairing a P0720 code in a 1999 Infiniti G20 can vary depending on the specific cause of the issue. Typically, the cost of a new vehicle speed sensor ranges from $50 to $150, while labor costs can range from $100 to $200. Overall, the total repair cost can be estimated to be between $150 and $350. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, labor rates, and additional repairs needed. It's recommended to consult with a professional mechanic for a more accurate cost estimate.

What does this mean?

Tech Notes for P0720 1999 Infiniti G20

On most Infiniti vehicles, the vehicle speed sensor is called Revolution Sensor. If there are no mechanical problems in the transmission, usually replacing the revolution sensor takes care of the problem.

When is the Code Detected?

Diagnostic trouble code is detected when Transmission Control Module (TCM) does not receive the proper voltage signal from the sensor.

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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 P0720 1999 Infiniti G20 Code

1. What does OBDII code P0720 mean for a 1999 Infiniti G20?

The P0720 code in a 1999 Infiniti G20 indicates a problem with the vehicle speed sensor (VSS).

2. What are common symptoms of a P0720 code on a 1999 Infiniti G20?

Common symptoms of a P0720 code include issues with the speedometer, erratic or non-functional speedometer readings, and potential issues with the vehicle's transmission shifting.

3. What are possible causes of a P0720 code on a 1999 Infiniti G20?

Possible causes of a P0720 code include a faulty vehicle speed sensor, damaged wiring or connectors related to the sensor, or a malfunctioning speedometer.

4. How can I diagnose a P0720 code on my 1999 Infiniti G20?

To diagnose a P0720 code, you can use an OBDII scanner to retrieve the trouble code and then inspect the vehicle speed sensor and its wiring for any visible damage or issues.

5. Can a P0720 code on a 1999 Infiniti G20 affect the vehicle's performance?

Yes, a P0720 code can potentially affect the vehicle's performance by causing issues with the transmission shifting and speedometer accuracy.

6. Is it safe to drive with a P0720 code on a 1999 Infiniti G20?

It is not recommended to drive with a P0720 code as it can lead to inaccurate speed readings and potential transmission issues, which may compromise safety.

7. How can I repair a P0720 code on my 1999 Infiniti G20?

To repair a P0720 code, you may need to replace the vehicle speed sensor or repair any damaged wiring or connectors associated with the sensor.

8. Can I reset the P0720 code on my 1999 Infiniti G20 without fixing the issue?

While you can clear the code with an OBDII scanner, it is important to address the underlying issue causing the P0720 code to prevent further problems.

9. Are there any DIY tips for fixing a P0720 code on a 1999 Infiniti G20?

DIY tips for fixing a P0720 code may include checking and cleaning the connectors, ensuring proper sensor alignment, and verifying the sensor's signal output.

10. How much does it typically cost to repair a P0720 code on a 1999 Infiniti G20?

The cost of repairing a P0720 code on a 1999 Infiniti G20 can vary depending on the specific issue, but typically, it may range from $100 to $300 for parts and labor.

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