P0722 Technical Description
Output Speed Sensor No Signal
If you’re seeing the P0722 trouble code, this guide will explain what it means, its symptoms, causes, and how to fix it.
I’ve seen this issue firsthand and have successfully resolved it.
From diagnosing faulty speed sensors to clearing the code, you’ll learn practical steps to get your car back on track.
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Key Takeaways
- The P0722 code means “Output Speed Sensor No Signal.”
- Symptoms include erratic shifting, a non-functional speedometer, and the Check Engine Light on.
- Common causes are a faulty output speed sensor, damaged wiring, or TCM issues.
- Diagnosing involves checking wiring, testing the sensor, and inspecting the TCM.
- Fixing may require replacing the output speed sensor or repairing damaged connectors.
- Clearing the code and test driving confirms the repair success.
Table of ContentsShow
What Does P0722 Trouble Code Mean?
The P0722 trouble code indicates that your vehicle’s Transmission Control Module (TCM) isn’t receiving a signal from the output speed sensor.
This sensor plays a critical role in monitoring the rotational speed of the transmission’s output shaft. The TCM relies on this information to manage shifting patterns, ensuring your vehicle runs smoothly and efficiently.
When the output speed sensor fails to send a signal, the TCM can’t determine the speed at which the transmission output shaft is rotating.
As a result, the TCM defaults to a fail-safe or limp mode to prevent damage to the transmission. This mode limits your vehicle’s performance to protect its components.
Several problems can trigger the P0722 code. A faulty output speed sensor is the most common cause.
Over time, sensors can wear out or become damaged due to exposure to harsh conditions.
Another potential cause is damaged wiring or connectors between the sensor and the TCM. Corrosion, fraying, or disconnections can interrupt the signal.
Additionally, issues with the TCM itself, such as internal faults or software glitches, can also cause this code.
When this code appears, you might notice symptoms like erratic or harsh shifting, a non-functional speedometer, and a slipping transmission. The Check Engine Light will also be illuminated, alerting you to the issue.
Ignoring the P0722 code can lead to more severe transmission problems and potentially costly repairs.
Addressing it promptly can prevent further damage and keep your vehicle running smoothly.
In summary, the P0722 code is a signal that there is a communication problem between your TCM and the output speed sensor, affecting your vehicle’s transmission performance.
P0722 Trouble Code Symptoms
Here are the common symptoms you might experience with the P0722 trouble code:
- Erratic or harsh shifting
- Speedometer not working
- Transmission slipping
- Check Engine Light on
- Poor fuel efficiency
- Vehicle stuck in limp mode
P0722 Trouble Code Causes
These are the typical causes behind the P0722 trouble code:
- Faulty output speed sensor
- Damaged wiring or connectors
- Transmission control module (TCM) issues
- Electrical system problems
- Corroded or loose connections
- Software glitches in the TCM
How To Fix A P0722 Trouble Code
Fixing the P0722 trouble code involves diagnosing the actual issue and performing the necessary repairs. Here’s a step-by-step guide to help you through the process:
1. Check for Other Codes
Use an OBD-II scanner to check for any additional trouble codes. Multiple codes can help pinpoint the issue.
2. Inspect the Wiring and Connectors
Visually inspect the wiring and connectors between the output speed sensor and the TCM. Look for any signs of damage, corrosion, or loose connections. Repair or replace any damaged components.
3. Test the Output Speed Sensor
Use a multimeter to test the output speed sensor. Check the sensor’s resistance and compare it to the manufacturer’s specifications. If the sensor is out of range, it may need to be replaced.
4. Check the TCM
Inspect the Transmission Control Module for any signs of damage or internal faults. Ensure the TCM’s software is up-to-date. If you suspect the TCM is faulty, consider consulting a professional for further testing or replacement.
5. Check for Electrical Issues
Ensure the vehicle’s electrical system is functioning correctly. Verify that the battery voltage is within the normal range and that there are no blown fuses or other electrical problems.
6. Replace the Output Speed Sensor
If the sensor is confirmed to be faulty, replace it with a new one. Follow the manufacturer’s instructions for proper installation.
7. Clear the Code and Test Drive
After performing the necessary repairs, use an OBD-II scanner to clear the trouble code. Take the vehicle for a test drive to ensure the issue is resolved and that the code does not reappear.
By following these steps, you can diagnose and fix the P0722 trouble code, restoring your vehicle’s transmission performance and preventing further issues.
Conclusion
You now know what the P0722 trouble code means and how to fix it.
Got any weird symptoms your car’s showing?
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