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P0720 2002 Infiniti G20 Code - Vehicle Speed Sensor

Quick Answer

The P0720 code for a 2002 Infiniti G20 refers to an issue with the Vehicle Speed Sensor (VSS). Common causes include Faulty Vehicle Speed Sensor, Wiring or connection issues, Corrosion or damage to the VSS. 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 2002 Infiniti G20 indicates Vehicle Speed Sensor.
Common causes
Common causes include Faulty Vehicle Speed Sensor, Wiring or connection issues, Corrosion or damage to the VSS.
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 08, 2024
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Code P0720 2002 Infiniti G20 Description

The P0720 code for a 2002 Infiniti G20 refers to an issue with the Vehicle Speed Sensor (VSS). The VSS is a crucial component in the vehicle's transmission system that measures the speed of the vehicle and sends this information to the engine control module (ECM). The ECM uses this data to adjust various systems, such as fuel injection, ignition timing, and transmission shifting. When the VSS malfunctions or fails, it can lead to a range of issues affecting the vehicle's performance and drivability.

OBDII Code P0720 2002 Infiniti G20 - Vehicle Speed Sensor
P0720 2002 Infiniti G20 Code - Vehicle Speed Sensor

Common Causes of P0720 2002 Infiniti G20

  1. Faulty Vehicle Speed Sensor
  2. Wiring or connection issues
  3. Corrosion or damage to the VSS
  4. ECM malfunction
  5. Transmission control module failure

Symptoms of P0720 2002 Infiniti G20

  1. Erratic or non-functioning speedometer
  2. Harsh or delayed shifting of the transmission
  3. Inaccurate odometer readings
  4. Check Engine Light illuminated
  5. Loss of fuel efficiency

How to Fix P0720 2002 Infiniti G20

  1. Diagnose the issue by using a diagnostic scanner to confirm the P0720 code and perform a visual inspection of the VSS and wiring.
  2. Replace the Vehicle Speed Sensor if it is found to be faulty. This involves locating the sensor, disconnecting the electrical connector, removing the mounting bolts, and installing the new sensor.
  3. Check and repair any damaged wiring or connectors associated with the VSS.
  4. Clear the fault code from the ECM and test drive the vehicle to ensure proper operation of the VSS and transmission.
  5. If the issue persists, further diagnostics may be required to check for underlying ECM or transmission control module faults.

Cost to Fix P0720 2002 Infiniti G20

The cost of repairing a P0720 code on a 2002 Infiniti G20 can vary depending on the location, repair shop rates, and the specific parts needed. Generally, the cost of replacing a Vehicle Speed Sensor ranges from $100 to $200, with additional labor costs of $100 to $200. Overall, the total repair cost for addressing a P0720 code can range from $200 to $400. It is advisable to get quotes from local repair shops to get a more accurate estimate based on your specific circumstances.

What does this mean?

Tech Notes for P0720 2002 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 2002 Infiniti G20 Code

1. What does OBDII code P0720 mean for my 2002 Infiniti G20?

Code P0720 indicates a problem with the vehicle speed sensor (VSS) in your Infiniti G20.

2. What are the common symptoms of a P0720 code in a 2002 Infiniti G20?

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

3. What are the possible causes of a P0720 code in a 2002 Infiniti G20?

Potential causes include a faulty vehicle speed sensor, damaged wiring or connectors, a defective transmission control module (TCM), or issues with the speedometer.

4. How can I diagnose the cause of a P0720 code in my 2002 Infiniti G20?

Diagnosing the issue typically involves testing the vehicle speed sensor using a multimeter, inspecting the wiring and connectors for damage, and checking for any other related transmission or speedometer problems.

5. Can I continue driving my 2002 Infiniti G20 with a P0720 code?

It is not recommended to drive your vehicle with a P0720 code as it can lead to transmission issues and potential safety hazards. It is best to address the problem promptly.

6. How can I repair a P0720 code in my 2002 Infiniti G20?

Repair options include replacing the vehicle speed sensor, repairing or replacing damaged wiring or connectors, resetting the TCM, or addressing any other underlying issues causing the code.

7. Can a DIY enthusiast fix a P0720 code in a 2002 Infiniti G20?

Depending on your skill level, you may be able to replace the vehicle speed sensor or check the wiring yourself. However, diagnosing and repairing more complex issues may require professional help.

8. How much does it cost to repair a P0720 code in a 2002 Infiniti G20?

The cost of repairing a P0720 code can vary depending on the specific cause of the issue, labor rates in your area, and whether you choose to DIY or seek professional assistance. Costs can range from $100 to $500 or more.

9. Will resetting the OBDII code P0720 in my 2002 Infiniti G20 make it go away permanently?

Resetting the code may temporarily clear the warning light, but if the underlying issue causing the P0720 code is not addressed, it is likely to reappear. It is important to diagnose and repair the problem to prevent further issues.

10. How important is it to fix a P0720 code in a 2002 Infiniti G20?

It is crucial to address a P0720 code promptly to prevent potential transmission damage, improve driving safety, and ensure your vehicle operates properly. Ignoring the code can lead to more severe issues down the line.

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