The P0720 Volkswagen code indicates a malfunction in the output speed sensor circuit, signaling no proper signal from the sensor. This sensor monitors the transmission's output shaft speed, vital for correct gear shifting managed by the Transmission Control Module (TCM). Faulty wiring or corroded connections commonly cause this issue, leading to erratic gear changes and reduced fuel efficiency. Skilled diagnostics require tools like a digital multimeter and OBD-II scanner. Fixing involves sensor inspection, wiring checks, and possibly, sensor replacement. Repair costs range from $150 to $400, depending on labor and parts. Exploring further aids in uncovering precise repair strategies.
P0720 VW Code Meaning
The P0720 code in Volkswagen cars points to a problem with the output speed sensor circuit. This sensor checks how fast the transmission output shaft is spinning.
When this code appears, it means the Transmission Control Module (TCM) is getting the wrong voltage signal from the sensor.
This sensor's job is to help the car change gears at the right time, which affects how well the car performs and how much fuel it uses. If there's trouble with this sensor, gear shifts can become rough or inefficient.
Causes of this issue might include a broken sensor, bad wiring, or rusty electrical connections.
To fix it, mechanics usually inspect the sensor and wires to make sure everything is working properly.
Error Code P0720 Symptoms
If your Volkswagen shows the P0720 code, it can mess with how the car drives.
You might notice some clear signs:
- Strange Gear Changes: Gears might switch too quickly or too slowly. This makes the ride feel rough and not smooth.
- Gears Slipping: You might feel a drop in power. The car may not speed up well or keep its speed.
- Check Engine Light On: This light means there's a problem with the output speed sensor circuit.
These issues often mean the transmission isn't getting good info from the sensor.
This can mess up how the car shifts gears. Fixing these signs can help the car drive better again.
Causes of VW P0720 Fault Code
When dealing with the P0720 code in Volkswagen cars, it's helpful to know what might cause it. The main issue often comes from the output speed sensor not working right. This sensor helps the car's computer, called the Transmission Control Module (TCM), to keep everything running smoothly.
Here's a breakdown of common causes:
- Wiring and Connector Problems: Sometimes, the wires or plugs between the speed sensor and TCM get damaged or stop working properly. This can mess up the signals they send, which might cause the P0720 code to appear. Checking these parts for damage is necessary.
- Transmission Fluid Issues: If the transmission fluid is low or dirty, it can affect how the speed sensor works. This might lead to wrong readings or no signal at all. Regularly checking and changing the fluid can help prevent this.
- ECU Troubles: The Engine Control Unit (ECU) might have problems that stop it from understanding signals from the speed sensor. If the ECU misreads this data, it can cause the P0720 code.
Tools Needed to Diagnose
To figure out the P0720 code in Volkswagen cars, you'll need some basic tools. A digital multimeter helps you check voltage and resistance in the output speed sensor circuit. This tool lets you find electrical problems that might cause the P0720 code.
An OBD-II scanner is also needed. It reads the P0720 code and other related trouble codes from the car's computer system, giving you an overview of the car's electronic condition.
A wiring diagram specific to the Volkswagen model is important for checking the vehicle's wiring and electrical connections. It helps you trace the output speed sensor circuit and find any damaged or faulty wires.
An oscilloscope can be used to look at the sensor's signal waveform, providing useful information about how well it is working.
Here's a quick list of tools:
- Digital Multimeter: Checks voltage and resistance to spot electrical issues.
- OBD-II Scanner: Reads problem codes from the car's computer.
- Wiring Diagram: Helps track and identify circuit problems.
These tools are key for diagnosing the P0720 code.
How to Fix P0720 VW Error Code – Step by Step
Step 1: Confirm the P0720 Error Code
Use an OBD-II scanner to confirm the presence of the P0720 error code in your Volkswagen vehicle. This step ensures accurate identification and helps uncover any additional trouble codes that may provide further insights.
Step 2: Inspect the Output Speed Sensor
Conduct a thorough visual inspection of the output speed sensor. Look for any signs of damage, corrosion, or loose connections. Ensure that the sensor is securely mounted to avoid any disruptions in its functionality.
Step 3: Examine Wiring and Connectors
Check the wiring harness and connectors leading to the output speed sensor for any issues. Use a multimeter to test for continuity, shorts, or breaks in the circuit that may disrupt signal transmission to the ECU.
Step 4: Check Transmission Fluid Levels
Inspect the transmission fluid levels and condition. Low or contaminated transmission fluid can adversely affect sensor performance. Ensure fluid levels are adequate and the fluid is clean and uncontaminated for optimal functionality.
Step 5: Replace Sensor and Clear Code
If necessary, replace the output speed sensor. Clear the P0720 code from the ECU and conduct a test drive to confirm the restoration of proper functionality, ensuring the vehicle operates smoothly without triggering the error code again.
Common Diagnosis Mistakes
Mistakes in diagnosing the P0720 error code in Volkswagen cars often happen because basic checks are skipped. People often wrongly think the output speed sensor is broken without first looking at the wires or connectors that might be causing the problem.
Additionally, technicians might not check the transmission fluid, which, if low or dirty, can mess up sensor readings and seem like a sensor problem. A good diagnostic process should follow a clear method to avoid these mistakes.
- Check Wiring and Connectors: Always look at the sensor's wires and connectors for any damage or rust. Many times, problems come from bad connections, not the sensor itself.
- Check Transmission Fluid: Look at the transmission fluid to see if it's low or dirty. Bad fluid can make the sensor not work right, which might cause the wrong error codes.
- Use the Right Tools: Use good diagnostic tools to check the P0720 code and any other related codes. This helps to find the real problem and prevent changing parts that don't need to be changed.
Ignoring these steps can lead to diagnosing mistakes because gear issues might not only be from the sensor.
Also, problems with the car's computer might be missed, leaving the issue unsolved.
P0720 VW Repair Cost
A P0720 error code in a Volkswagen usually means a repair bill between $150 and $400, covering both parts and labor.
Labor charges differ, with shops charging anywhere from $75 to $150 per hour based on their location and rates. Parts, like a faulty output speed sensor, generally cost between $50 and $150. Prices vary depending on the vehicle's make and model, as some require specialized components.
Sometimes, extra costs might come up if detailed diagnostics are needed. Finding issues like wiring problems or ECU malfunctions can add more to the repair bill.
Getting multiple repair quotes is a good idea to compare prices and predict costs specific to the VW model.
Vehicle owners should compare repair shops. Some may charge less for labor but might not have the needed Volkswagen expertise.
Choosing a reputable shop with a solid track record can save time and money while ensuring reliable repairs.
Related Error Codes on Volkswagen
When you see a P0720 error code on your Volkswagen, other codes might also show up. These can help you figure out what's wrong. These codes usually point to problems in the transmission, especially with the output speed sensor.
- P0721: This code shows there's a problem with how the output speed sensor is working.
- P0722: This code means the sensor isn't sending any signals.
- P0730: This code tells you the car isn't shifting gears right, possibly due to sensor issues.
- P0740: This code is about problems with the torque converter clutch circuit, which might also be related to sensor issues.
If you see code P0700 with P0720, it means there's a bigger issue with the transmission control system.
| Error Code | Description | Potential Issue |
|---|---|---|
| P0721 | Output Speed Sensor Issue | Sensor not working well |
| P0722 | No Signal from Sensor | Sensor not signaling |
| P0730 | Gear Shifting Problem | Transmission problem |
| P0740 | Torque Converter Circuit Issue | Torque converter problem |
Check these codes soon to avoid more problems.
Can I drive safely with P0720 VW?
No, driving with a P0720 error in your VW is not safe.
This code means there's a problem with the speed sensor, which can cause your car to shift gears badly.
It's best to get it fixed right away to avoid accidents or more damage.
People Also Ask
How Often Should the Output Speed Sensor Be Inspected on a Volkswagen?
Check the output speed sensor on a Volkswagen every 30,000 to 60,000 miles during regular car check-ups. If you notice problems like strange shifting or see the Check Engine Light, you should have it checked right away.
Does the P0720 Code Affect Fuel Efficiency in Volkswagen Vehicles?
Yes, the P0720 code affects fuel efficiency in Volkswagen cars. It makes the car shift gears strangely and slip. This causes the engine to work harder and use more fuel, so the car doesn't get as many miles per gallon.
Are There Any Recalls Related to the P0720 Code on Volkswagen Models?
There aren't any big recalls for the P0720 code in Volkswagen cars right now. It's a good idea to check with your local car dealer or the NHTSA website to see if there are any updates or special fixes for your car.
What Are the Long-Term Effects of Ignoring the P0720 Code in a Volkswagen?
If you ignore the P0720 code in a Volkswagen, it can cause big problems like the transmission breaking, costing more to fix, making the car less safe, using more gas, and harming the Transmission Control Module. Always fix it soon!
Can Aftermarket Parts Resolve the P0720 Code Issue in Volkswagen Vehicles?
Yes, aftermarket parts can fix the P0720 code in Volkswagen cars if they meet the same standards as the original parts. Choose good brands, make sure they fit, and think about any effects on your car's warranty and how it runs over time.