Engine-CodesMazda – P0720 Mazda

P0720 Mazda Code - Output Speed Sensor Circuit Malfunction

Quick Answer

The P0720 code for Mazda vehicles indicates a malfunction in the Output Speed Sensor Circuit. Common causes include Faulty output speed sensor, Damaged wiring or connectors in the sensor circuit, Low transmission fluid levels. 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 Mazda indicates Output Speed Sensor Circuit Malfunction.
Common causes
Common causes include Faulty output speed sensor, Damaged wiring or connectors in the sensor circuit, Low transmission fluid levels.
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.
Table of contents Created and updated by William Orellana on Aug 18, 2024
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Code P0720 Mazda Description

The P0720 code for Mazda vehicles indicates a malfunction in the Output Speed Sensor Circuit. The output speed sensor is a crucial component of the vehicle's transmission system, responsible for monitoring the speed of the output shaft. This information is used by the vehicle's control module to determine shift points and ensure smooth transmission operation. When this sensor malfunctions, it can lead to erratic shifting, poor performance, and even transmission failure if left unresolved.

OBDII Code P0720 Mazda - Output Speed Sensor Circuit Malfunction
P0720 Mazda Code - Output Speed Sensor Circuit Malfunction

Common Causes of P0720 Mazda

  1. Faulty output speed sensor
  2. Damaged wiring or connectors in the sensor circuit
  3. Low transmission fluid levels
  4. Transmission control module issues
  5. Mechanical problems within the transmission

Symptoms of P0720 Mazda

  1. Delayed or erratic shifting
  2. Harsh shifting between gears
  3. Transmission slipping
  4. Inaccurate speedometer readings
  5. Illumination of the Check Engine Light

How to Fix P0720 Mazda

  1. Diagnose the issue by using a scan tool to read the code and inspect the output speed sensor and its circuit.
  2. Replace the faulty output speed sensor if it is determined to be the root cause of the issue.
  3. Repair or replace any damaged wiring or connectors in the sensor circuit.
  4. Check and top off transmission fluid levels if necessary.
  5. Reset the vehicle's computer system to clear the code and test drive the vehicle to ensure proper operation.

Cost to Fix P0720 Mazda

The cost of repairing a P0720 code for a Mazda can vary depending on the specific model and year of the vehicle, as well as the labor rates in your area. Generally, the parts cost for a new output speed sensor can range from $50 to $150, while the labor cost can range from $100 to $200. Overall, you can expect to pay between $150 and $350 for this repair. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate based on your specific circumstances.

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 Mazda Code

1. What does the OBDII code P0720 mean on a Mazda?

P0720 indicates a malfunction in the output speed sensor circuit, which monitors the rotational speed of the transmission output shaft.

2. What are the common symptoms of a P0720 code on a Mazda?

Symptoms include erratic shifting, poor acceleration, the speedometer not working, and the Check Engine Light turning on.

3. What causes a P0720 code on a Mazda?

Common causes include a faulty output speed sensor, damaged wiring or connectors, a malfunctioning PCM, or internal transmission issues.

4. Can I drive my Mazda with a P0720 code?

Driving with a P0720 code is not recommended as it can lead to poor performance, increased fuel consumption, and potential transmission damage.

5. How do I diagnose a P0720 code on a Mazda?

Start by inspecting the output speed sensor, wiring, and connectors for damage. Use a multimeter to test the sensor for proper resistance and check for any fault codes related to the transmission.

6. How do I fix a P0720 code on a Mazda?

Repairs may include replacing the output speed sensor, repairing damaged wiring, cleaning corroded connectors, or reprogramming the PCM if necessary.

7. Where is the output speed sensor located on a Mazda?

The output speed sensor is typically located on the transmission, near the output shaft or differential housing.

8. How much does it cost to fix a P0720 code on a Mazda?

Repair costs can vary, but replacing the output speed sensor typically costs between $150 and $300, including parts and labor.

9. Can a dirty or low transmission fluid level cause a P0720 code?

Yes, dirty or low transmission fluid can affect sensor performance and trigger a P0720 code. Always check the fluid level and condition.

10. Will clearing the code fix the P0720 issue on my Mazda?

Clearing the code will remove it temporarily, but the underlying issue must be addressed to prevent the code from returning.

Discuss the causes and fixes for P0720 Mazda OBDII Code

  • i need help in spanish se encendio el el check engine y aparecio unas palabras AT en el tablero el vehiculo no ha sufrido cambio en velocidad funciona loa tacometros de velocidad lo escaneamos y apagamos el codigo y aparece nuevamente se limpiaron los contactos y nada que podria ser el vehiculo es un mazda 3 2.5 lts y es año 2011 ya se le revisaron las posibles causas y siempre lo detecta mal q hago gracias por la ayuda

  • Lo primero que tienen que hacer es consguir un scanner para leer el codigo. Si la luz del "AT" Automatic Transmission (transmission automatica) entonce quiere decir que hay un problema con la transmission Y necesita un scanner para leer el codigo.

  • buenos dias, alguien me puede ayudar en que arte queda el sensor de velocidad de salida de la mazda mpv 2005, muchas gracias.

  • Esta es la unica imagen encontre en el manual. Para el P0720 es el "Vehicle Speedometer Sensor"

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