By Ezra Lane When you encounter the P0720 error code on your 2001 Nissan Maxima, it points to a problem in the output speed sensor circuit, impacting the transmission's functionality. This sensor's primary role is to monitor the transmission output speed, which helps control gear shifting, ignition timing, and fuel injection. Common issues triggering this code include a faulty sensor, damaged wiring, or corrosion in connectors. To address this, you'll need to inspect and possibly replace the speed sensor. Repair costs generally range between $150 and $400. Keep an eye out for erratic shifting or a malfunctioning speedometer as early signs. By addressing this promptly, you stand a better chance of avoiding more severe transmission problems.
P0720 Nissan Code Meaning
The P0720 code on a Nissan Maxima indicates a malfunction in the vehicle speed sensor (VSS) circuit, affecting speed data to the ECM or TCM.
This can impact fuel injection, ignition timing, and gear shifting.
Causes include a faulty sensor, damaged wiring, or malfunctioning modules.
Error Code P0720 Symptoms
When your Nissan Maxima shows the P0720 error code, you might notice a few problems.
Here's what could happen:
- Erratic Shifting: The car might change gears roughly or at the wrong times because the transmission isn't getting the right speed information.
- Speedometer Issues: The speedometer might show zero or wrong speeds, even when you're driving.
- Acceleration Hesitation: The car mightn't speed up smoothly when you press the gas pedal. Instead, you might feel a delay or a jerk.
- Stalling: The car may stall, especially when driving slowly or stopping.
- Check Engine Light: This light will turn on, signaling that there's a problem with the car's speed sensor.
These problems can make driving uncomfortable and might lead to more issues if not fixed.
Causes of Nissan P0720 Fault Code
If your Nissan Maxima shows a P0720 error code, it usually means there's a problem with how your car reads speed. Here's what you need to check:
- Vehicle Speed Sensor (VSS) Issues: This sensor helps your car's computer know how fast you're going. If it breaks or sends wrong data, you might see the P0720 code.
- Wiring or Connector Problems: Wires or connectors can sometimes break or get loose, which stops the speed data from reaching the car's computer.
- ECM or TCM Problems: These are parts of your car's control system. If they can't get the right speed data, the error code might appear.
- Transmission Issues: Problems inside the transmission, like leaks or broken parts, can cause the P0720 code.
- Corroded Connectors: Over time, connectors can rust, stopping the speed sensor from working properly.
Finding and fixing these problems can help keep your Nissan Maxima running well.
Tools Needed to Diagnose
To fix the P0720 error on a Nissan Maxima, you'll need a few tools to check things out properly. Having the right tools makes the job easier and helps you find the problem faster.
Here's what you need:
- OBD-II Scanner: This handy gadget reads the P0720 error code and helps you find out what's wrong with the car's speed sensor.
- Multimeter: Use this to check the wires connected to the speed sensor. It helps ensure that electricity flows correctly and there are no wiring issues.
- Diagnostic Tool with Live Data: This tool lets you watch the speed sensor in action. It shows how the sensor works at different speeds, helping you spot any problems that come and go.
- Basic Hand Tools: You'll need wrenches and screwdrivers to reach the speed sensor. These tools might also be needed if you have to change the sensor.
- Repair Manual for 2001 Nissan Maxima: This manual gives you step-by-step instructions specific to your car, so you do things the right way when checking the speed sensor circuit.
How to Fix P0720 Nissan Error Code – Step by Step
Step 1:
Plug in your OBD-II scanner to confirm the P0720 error code in your Nissan Maxima. Check for any additional codes that might indicate related issues.
Step 2:
Conduct a visual inspection of the vehicle speed sensor (VSS), its wiring, and connectors. Look for signs of damage, corrosion, or loose connections that could disrupt signal transmission.
Step 3:
If you find the VSS damaged or suspect it's faulty, replace it. Ensure the new sensor is properly aligned and secured during installation to accurately relay speed data to the Engine Control Module (ECM) and Transmission Control Module (TCM).
Step 4:
Test both the ECM and TCM to verify they aren't malfunctioning and are effectively communicating with the VSS.
Step 5:
Once you've addressed these components, clear all fault codes from the system.
Common Diagnosis Mistakes
When diagnosing the P0720 code on a Nissan Maxima, you might make some common mistakes that could complicate things. Simple but important details can affect your car's performance and your diagnostic process.
Here are some typical mistakes:
- Check the Wiring: Look at the wiring and connectors connected to the vehicle speed sensor. Corrosion or damage can mess with signal transmission and lead you to the wrong diagnosis.
- Double-Check Before Replacing the Sensor: Before swapping out the vehicle speed sensor, see if the ECM or TCM is the real problem. Replacing the sensor unnecessarily can be costly.
- Inspect the Whole System: Examine the entire transmission system. Internal transmission problems can look like speed sensor issues, causing incorrect diagnoses.
- Look for Other Codes: Don't focus only on the P0720 code. Check for other related codes that might point to additional problems affecting your car's performance.
- Test After Repairs: Take a proper test drive after making repairs to ensure the problem is fixed, especially if the issue happens off and on.
Avoiding these mistakes can make your diagnosis more accurate and help you save time and resources.
P0720 Nissan Repair Cost
Fixing the P0720 code on a 2001 Nissan Maxima can cost between $150 and $400. This includes parts and labor.
The vehicle speed sensor, often the cause, costs $50 to $150 depending on the brand. Labor costs range from $80 to $150 per hour. Most mechanics can diagnose and replace the sensor in one to two hours.
Your final cost depends on the mechanic's rate and time spent on the job. Costs can vary based on location and vehicle needs.
It's a good idea to get estimates from local mechanics. If there are other issues, like wiring problems or ECM malfunctions, the total cost may be higher.
Related Error Codes on Nissan
When dealing with Nissan error codes, these common ones often show up alongside P0720, indicating issues with the vehicle's speed sensor.
- P0721: This code means there's a problem with how the output speed sensor is working. The sensor's readings are not what they should be.
- P0722: This code shows there's no signal coming from the output speed sensor. It might be due to a bad sensor or a wiring problem.
- P0730: This code indicates there's a problem with the gear ratios. This can happen if the speed sensor isn't working right and can't provide the correct data for gear shifts.
- P0500: This code means there's an issue with the vehicle speed sensor itself, suggesting a larger problem with this part.
Here's a handy table for these codes:
| Code | Description |
|---|---|
| P0720 | Output Speed Sensor Circuit Malfunction |
| P0721 | Output Speed Sensor Range/Performance Problem |
| P0722 | Output Speed Sensor No Signal |
| P0730 | Incorrect Gear Ratio |
Addressing these codes together can help improve how your Nissan runs and how reliable it is.
Can I drive safely with P0720 Nissan?
No, it's not safe to drive your Nissan with a P0720 error.
This problem can make your car shift gears badly, give wrong speed readings, and even stall.
These issues can be dangerous. It's best to get it fixed right away.
People Also Ask
Can Weather Conditions Affect the Output Speed Sensor Malfunction?
Yes, weather can affect your car's output speed sensor. Rain, snow, hot or cold temperatures, and humidity might cause problems. They can make the sensor's wires wet or loose, which can stop it from working properly.
How Does P0720 Code Impact Fuel Efficiency?
When the car's speed sensor isn't working right, it messes up the fuel injection timing. This can make the engine and transmission act funny, using more fuel than usual, which means worse gas mileage.
What Is the Lifespan of a Nissan Maxima Output Speed Sensor?
A Nissan Maxima's output speed sensor usually lasts between 50,000 and 100,000 miles. But this can change depending on how you drive and take care of your car. So, if you drive gently and maintain your car well, it might last longer.
Are There Aftermarket Sensors That Perform Better Than OEM?
Yes, some aftermarket sensors work better than the original ones. They can last longer, are tougher against weather, and often cost less money. Plus, they might have better guarantees, so they are a good choice if you want something strong and reliable.
Can a P0720 Code Trigger Other Related Error Codes Over Time?
Yes, a P0720 code can cause more error codes after some time. This can affect the car's transmission and engine, making the car shift gears strangely and possibly causing more damage to the transmission system.