P0720 Technical Description
Output Speed Sensor Circuit Malfunction
If you’re reading this, you’re likely dealing with a P0720 trouble code on your car. In this guide, we’ll cover everything from what it means to how to fix it.
I’ve tackled this issue numerous times, so you’re in good hands.
We’ll break down the technical definition, symptoms, causes, and the best fixes for the P0720 code. By the end, you’ll be well-equipped to handle it.
Alright, let’s get to the nitty-gritty of fixing that pesky P0720 code.
Key Takeaways
- P0720 Code Meaning: Indicates an output speed sensor circuit malfunction.
- Common Symptoms: Includes Check Engine Light, erratic shifting, and poor fuel economy.
- Main Causes: Faulty sensor, damaged wiring, TCM issues, and dirty transmission fluid.
- Diagnostic Steps: Use an OBD-II scanner, inspect the sensor and wiring, and test the TCM.
- Repair Procedures: Replace faulty components, check transmission fluid, and clear the code.
- Preventive Measures: Regularly check transmission components and maintain clean transmission fluid.
Table of ContentsShow
What Does P0720 Trouble Code Mean?
The P0720 trouble code indicates an issue with the output speed sensor circuit in your vehicle. This sensor measures the rotational speed of the transmission’s output shaft.
The data collected by the sensor is crucial for the transmission control module (TCM) to manage gear shifts efficiently.
If the TCM detects an abnormal or no signal from the sensor, it triggers the P0720 code.
When this code appears, it means the TCM isn’t receiving accurate information about the transmission’s output speed.
This can cause the vehicle to experience shifting problems, including erratic or harsh shifts, or even prevent the transmission from shifting correctly.
The root of this issue could lie in the sensor itself, the wiring, or the connections in the circuit.
Driving with a faulty output speed sensor can lead to poor performance and potentially more serious transmission issues if left unresolved.
It’s essential to address this problem promptly to avoid further damage. The output speed sensor’s data helps your car’s computer make critical adjustments to maintain optimal performance and fuel efficiency.
Without accurate input, the system can’t operate as designed, leading to various drivability issues.
In essence, the P0720 code points to a communication breakdown between your transmission’s output speed sensor and the TCM.
Fixing it typically involves inspecting the sensor, checking the wiring and connectors, and replacing any faulty components.
Understanding and addressing the P0720 code quickly can save you from more significant transmission problems down the road.
P0720 Trouble Code Symptoms
When your vehicle’s computer detects a P0720 code, you’ll likely notice the following symptoms:
- Check Engine Light illuminated
- Erratic or harsh gear shifting
- Transmission stuck in a single gear
- Speedometer not working correctly
- Poor fuel economy
- Reduced engine performance
P0720 Trouble Code Causes
Several issues can trigger a P0720 code. Here are the most common causes:
- Faulty output speed sensor
- Damaged or corroded wiring and connectors
- Malfunctioning transmission control module (TCM)
- Issues with the vehicle’s powertrain control module (PCM)
- Dirty or contaminated transmission fluid
- Mechanical problems within the transmission
How To Fix A P0720 Trouble Code
Fixing a P0720 trouble code involves several diagnostic steps and possible repairs. Here’s how you can tackle it:
1. Use an OBD-II Scanner
Start by using an OBD-II scanner to confirm the P0720 code. This tool will help you pinpoint the issue.
2. Inspect the Output Speed Senso
Locate the output speed sensor, usually found on the transmission. Check for visible damage or wear. If it appears damaged, replacing it might solve the problem.
3. Check the Wiring and Connectors
Inspect the wiring and connectors linked to the output speed sensor. Look for signs of damage, corrosion, or loose connections. Repair or replace any faulty wiring or connectors.
4. Test the Sensor
Use a multimeter to test the sensor’s resistance. Compare the readings to the manufacturer’s specifications. If the readings are off, the sensor may need to be replaced.
5. Examine the Transmission Control Module (TCM)
If the sensor and wiring are in good condition, the issue might be with the TCM. Test the TCM for proper function. If it’s faulty, replacing the TCM might be necessary.
6. Check the Transmission Fluid
Dirty or contaminated transmission fluid can affect sensor performance. Check the fluid level and condition. If the fluid is dirty, a transmission fluid change might be needed.
7. Look for Mechanical Issues
In rare cases, the problem could be mechanical. Inspect the transmission for internal issues that might affect the output speed sensor.
8. Clear the Code and Test Drive
After addressing the issues, clear the code using the OBD-II scanner and take the car for a test drive. Monitor to see if the code returns.
Following these steps should help you diagnose and fix the P0720 trouble code, restoring your vehicle’s performance.
Conclusion
Now you know what the P0720 trouble code means and how to fix it yourself.
Have you ever had issues with your output speed sensor?
Drop a comment below and share your experience or any tips you might have!
