By Ezra Lane When your Nissan displays the P0720 code, it indicates a malfunction in the output speed sensor circuit, which critically impacts the vehicle's speedometer accuracy and transmission functionality. This malfunction can be due to a defective vehicle speed sensor, damaged wiring, or ECM issues. You'll likely experience erratic speedometer readings, poor vehicle acceleration, and unusual shifts. For diagnostics, you'll need tools like a digital multimeter and an OBD-II scanner. Repair often involves replacing the faulty sensor and repairing any damaged connections. Addressing this code promptly can prevent further complications and costly repairs. With a deeper exploration, you'll grasp effective troubleshooting practices for resolving the P0720 error.
P0720 Nissan Code Meaning
A P0720 code in your Nissan indicates a problem with the vehicle speed sensor (VSS) circuit.
It affects speedometer accuracy and engine performance.
Causes include a faulty sensor, damaged wiring, or ECM issues.
Addressing it promptly prevents complications like erratic shifts and reduced fuel efficiency.
Error Code P0720 Symptoms
If you see a P0720 error code on your Nissan, you might notice some strange symptoms. The speedometer could show unusual or inconsistent readings. This makes it hard to know how fast you're going, which might cause safety issues or speeding tickets.
The P0720 error can also make your car shift gears roughly or with a delay. It can feel like the car hesitates or jerks when you change gears. This makes driving less smooth and less efficient. You might also find that the car doesn't accelerate well. It might respond slowly when you press the gas pedal, making it feel less lively.
Other things you might notice include:
- Using more gas: The car might burn more fuel because it doesn't get the right speed data.
- Lights on the dashboard: You might see the check engine light come on.
- Overall performance drop: These problems can make the car less fun to drive and cost more to run.
Causes of Nissan P0720 Fault Code
A common reason for the Nissan P0720 error is a bad vehicle speed sensor (VSS). This sensor gives speed info to the engine control module (ECM). If it doesn't work, the ECM can't track speed right, triggering the P0720 code.
Look at the wires and connectors in the VSS circuit. Damaged or rusty ones can mess up signals from the sensor to the ECM. Physical issues with the sensor, like dirt buildup or hits, might also cause problems. These often come from rough driving or skipping regular maintenance.
Sometimes, the problem goes beyond the speed sensor:
- Wiring problems: Rust or damage can block signals
- ECM faults: Issues in the control unit can misread sensor signals
- Transmission issues: Other transmission troubles might wrongly set off the P0720 code
Tools Needed to Diagnose
To check the P0720 code in your Nissan, you'll need a few tools.
First, get a digital multimeter. This helps you check the voltage and resistance in the speed sensor circuit. With it, you can find out where things might be going wrong.
An OBD-II scanner is also needed. This tool lets you read the codes from your Nissan. You can also use it to clear codes from the car's computer after fixing the problem, which helps see if the problem is gone.
You should also have a wiring diagram for your Nissan model. This shows you how the wires are laid out, so you can check the right connections related to the speed sensor.
Here's what you'll need:
- Digital Multimeter: To test electrical values.
- OBD-II Scanner: To read and clear codes from your car.
- Wiring Diagram: To find the right wires and connections.
How to Fix P0720 Nissan Error Code – Step by Step
Step 1:
Start by using a scan tool to confirm the presence of the P0720 trouble code, which indicates a malfunction in the vehicle speed sensor circuit.
Step 2:
Test the vehicle speed sensor (VSS) itself. Use a multimeter to measure the voltage output and resistance of the VSS. Ensure that these readings match the manufacturer's specifications; any deviation suggests a faulty sensor.
Step 3:
If your testing concludes that the VSS is indeed defective, replace it with a new one, adhering to the guidelines specified in the vehicle's service manual.
Step 4:
Inspect the wiring and connectors leading to the VSS. Look for signs of damage, corrosion, or loose connections. Repair or replace any compromised components as necessary.
Step 5:
Once repairs are complete, clear the trouble code using the scan tool. Finalize the process by taking the vehicle for a test drive to confirm that the P0720 code doesn't reappear and that the vehicle is now operating normally.
Common Diagnosis Mistakes
When you see the P0720 code on a Nissan, check the vehicle speed sensor before deciding to replace it. Replacing it without checking can be expensive if the sensor isn't the problem.
Here are common mistakes to avoid:
- Look at the wiring and connectors: Don't just look at them. Use a multimeter to check if there are any shorts or breaks. Broken wires or loose connectors can mimic sensor issues.
- See if there are other codes: Don't ignore other related codes. They might show bigger issues with the ECM or other control units that affect the VSS circuit.
- Go for a test drive: After fixing anything, test drive the car. This helps you see if the P0720 code comes back and checks if the car runs well.
P0720 Nissan Repair Cost
If you have a P0720 error on your Nissan, knowing the repair costs can help. Replacing a bad vehicle speed sensor might cost between $100 and $300. The price depends on your car's make and model, which affects the parts needed and how hard they're to install.
But, the speed sensor mightn't be the only issue. Sometimes, wires or connectors in the speed sensor circuit are damaged and need fixing too. If you have these problems, your total cost might go up.
You also need to think about the labor charges. Mechanics usually charge $75 to $150 per hour. How long they work depends on how tricky the problem is and how long the fix takes.
If it's not just the sensor and there's a problem with the ECM or other control modules, the cost can be much higher, possibly over $500.
If you don't fix the P0720 error soon, it might cause more car problems, leading to even bigger repair costs later. Fixing it early can save you money and prevent more damage to your car.
Related Error Codes on Nissan
Various error codes related to the P0720 on Nissan cars can appear during checks. These codes show different issues with the speed sensor circuit. They can point to problems that might affect how your car runs. Here's a simple breakdown of common codes linked to the P0720:
| Code | Description | Impact on Vehicle |
|---|---|---|
| P0721 | Output Speed Sensor Range/Performance | May cause shifting issues or problems with the speedometer. |
| P0722 | Output Speed Sensor No Signal | Leads to loss of speed signal, which affects the transmission. |
| P0730 | Incorrect Gear Ratio | Signals transmission errors, possibly due to a faulty sensor. |
| P0500 | Vehicle Speed Sensor A Malfunction | Affects the speedometer and can impact vehicle stability. |
| P0723 | Output Speed Sensor Intermittent | Causes irregular transmission issues, making it hard to diagnose. |
When you see these codes, a detailed check is needed to find the real problem. Each code points to a different issue in the speed sensor circuit. Knowing these can help fix the problem, keeping your Nissan running smoothly.
Can I drive safely with P0720 Nissan?
It's not safe to drive your Nissan with the P0720 code.
This means there's a problem with the speed sensor.
Your car mightn't show the correct speed, shift roughly, and use more gas.
Get it checked and fixed soon to stay safe.
People Also Ask
What Is the Average Lifespan of an Output Speed Sensor?
An output speed sensor usually lasts between 50,000 and 100,000 miles. How long it lasts depends on how you drive and take care of your car. Checking and cleaning it often can help it last longer.
Does Weather Affect the Output Speed Sensor's Functionality?
Yes, weather can affect an output speed sensor. Rain, snow, very hot or cold temperatures, and high humidity can cause problems. These conditions might lead to rust, electrical troubles, or sensor failures, making the sensor less accurate and reliable.
Can Aftermarket Parts Solve P0720 Nissan Code Issues?
Yes, you can fix the P0720 Nissan code problem with aftermarket parts. They are often cheaper and work well like original parts. Just make sure they fit right and check your car's warranty because some parts might change it.
Are There Any Recalls Related to the P0720 Nissan Code?
There aren't any specific recalls for the P0720 Nissan code. But you can check the NHTSA website or ask your Nissan dealer about recalls for speed sensor problems, as these might be connected to the P0720 code.
How Does the Output Speed Sensor Impact Fuel Efficiency?
The output speed sensor in your car helps save fuel. It makes sure the engine works smoothly by giving the right information for fuel use and gear changes. This stops the engine from working too hard and using too much fuel.