[SOLVED] Mazda P0720 Code: Mazda Output Speed Sensor Quick Fix

The OBD code P0720 for Mazda indicates a malfunction in the Output Speed Sensor Circuit.

Symptoms include the Engine Light ON, erratic speedometer readings, and transmission issues.

Common causes are a faulty speed sensor, open/shorted sensor harness, or poor electrical connection.

This issue should be addressed promptly to prevent further transmission damage.

A possible fix involves inspecting the sensor, harness, and connectors for any damage or poor connections.

Repair Importance Level	10.0 (Out of 10)
Estimated Repair Time	Approximately 1.0 hour
Repair Difficulty Level	10.0 (Out of 10)

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Symptoms of the Mazda p0720 OBD Code

The vehicle may experience issues with the output speed sensor circuit.

With Mazda OBD code P0720, the Engine Light will be ON.
The Speedometer may show an improper reading.
Transmission issues like harsh shifting or slipping can occur.

Causes of the Mazda p0720 OBD Code

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Possible reasons for Mazda fault code P0720 include issues with the output speed sensor circuit.

P0720 can be caused by a Faulty Speed Sensor.
A Speed Sensor harness that is open or shorted.
A Speed Sensor circuit with poor electrical connection.

Fixing Mazda Error Code p0720 Step By Step

Inspect the vehicle’s output speed sensor circuit for potential issues.

To fix the Mazda OBDII code P0720, first, review the possible causes related to the output speed sensor circuit.
Visually inspect the wiring harness and connectors for any damage.
Check the connector pins for signs of being broken, bent, pushed out, or corroded.
Test the output speed sensor for proper operation and signal output.
Replace the output speed sensor if necessary.
Clear the fault codes and test drive the vehicle to verify the repair.
If the issue persists, further diagnosis may be needed to check for any underlying wiring faults or issues with the transmission control module.

Cost Of Fixing Mazda p0720 Fault Code

Diagnosing and repairing a P0720 fault code on a Mazda typically involves inspecting and possibly replacing the output speed sensor.

The cost to diagnose and fix a Mazda OBD code P0720 typically ranges from $75 to $150, with an estimated repair time of 1. 0 hour.

The final cost depends on labor rates, shop fees, and the complexity of the repair needed.

Details of the Mazda p0720 OBD Code

Mazda P0720 code indicates a problem with the output speed sensor circuit.

Mazda OBD code P0720 indicates a malfunction in the Output Speed Sensor Circuit.

This code is triggered by the Engine Control Module (ECM) when it detects an issue with the output speed sensor signal.

The output speed sensor is responsible for monitoring the speed of the transmission output shaft.

It provides crucial data to the ECM for proper transmission operation, including shift points and torque converter lockup.

When this sensor malfunctions or sends incorrect signals, it can lead to drivability issues, harsh shifting, or even transmission slipping.

It’s essential to diagnose and repair the output speed sensor or its circuit to ensure proper transmission function in the Mazda vehicle.

Mechanic’s Tech Notes

Detailed information on diagnosing and repairing a Mazda with fault code P0720.

To diagnose and fix OBDII code P0720 in a Mazda, start by checking the transmission control module (TCM) power and ground using a multimeter.

Verify TCM communication over the Controller Area Network (CAN) using a scan tool.

If the TCM does not respond, reprogramming or reflashing may be necessary.

Visually inspect the wiring harness and connectors for any damage, focusing on broken, bent, or corroded pins.

Ensure all connections are secure.

If the issue persists, consider testing the vehicle speed sensor and its circuit for faults.

FAQ

1. What does OBD code P0720 mean in a Mazda vehicle?

OBD code P0720 in a Mazda means a faulty speed sensor. Symptoms include Engine Light ON, improper speedometer reading, and transmission issues. Check wiring and connectors for damage.

2. What are the common causes of OBD code P0720 in a Mazda?

Common causes of OBD code P0720 in a Mazda include a faulty speed sensor, open/shorted harness, or poor electrical connection. Inspect and repair wiring/connectors for issues.

3. How can I diagnose and fix OBD code P0720 in my Mazda vehicle?

Diagnose and fix OBD code P0720 in your Mazda by checking the speed sensor, harness, and circuit for faults. Inspect wiring and connectors for damage or corrosion.

Wrap Up

If your Mazda is displaying OBD code P0720 and experiencing erratic shifting, stalling at stops, or a speedometer not working, it could be caused by a faulty output speed sensor, damaged wiring harness, low transmission fluid, or a malfunctioning TCM (Transmission Control Module).

To address Mazda OBD code P0720, start by inspecting the output speed sensor and its wiring for any damage or corrosion.

Check the transmission fluid level and quality, ensuring it meets manufacturer specifications.

If no issues are found, consider testing the TCM and related connectors for proper operation.