TransmissionCritical⚠️ Professional Recommended

P0720

Q: What does OBD2 code P0720 mean?

P0720 means: Output Speed Sensor Circuit Malfunction. The output shaft speed sensor has a circuit fault.

Output Speed Sensor Circuit Malfunction

The output shaft speed sensor has a circuit fault.

SeverityCritical

CategoryTransmission

Est. Repair Cost$150–$500

Code TypePowertrain

DIY RepairProfessional

⚡ Common Causes

›Faulty output speed sensor
›Wiring damage
›Metal debris on sensor
›Damaged tone ring

⚠️ Symptoms

›Erratic speedometer
›Harsh shifting
›Check engine light
›Transmission issues

✅ How to Fix — Step by Step

Step 1:Check output sensor connector
Step 2:Inspect wiring
Step 3:Replace output speed sensor
Step 4:Check tone ring for damage

🔧 Diagnostic Tools Required

✔OBD-II Diagnostic Scanner
✔Transmission Pressure Gauge
✔ATF Temperature Reader
✔Digital Multimeter
✔Basic Hand Tools

Using the correct diagnostic tools helps identify the root cause of P0720 before replacing parts unnecessarily. Always confirm the fault using live data and manufacturer-recommended diagnostic procedures.

💡 Pro Tip: The output speed sensor also controls the speedometer — a faulty one causes both shifting and speed issues.

Frequently Asked Questions

What does OBD2 code P0720 mean?+

P0720 stands for Output Speed Sensor Circuit Malfunction. The output shaft speed sensor has a circuit fault.

What causes code P0720?+

Faulty output speed sensor; Wiring damage; Metal debris on sensor; Damaged tone ring

How do I fix code P0720?+

Check output sensor connector; Inspect wiring; Replace output speed sensor; Check tone ring for damage

How much does it cost to fix P0720?+

Estimated repair cost for P0720 is $150–$500.

Is P0720 DIY-friendly?+

P0720 typically requires professional equipment and a qualified mechanic.