Nissan Fault Codes: Read & Clear Them Easily

Nissan Motor Corporation, a Japanese multinational automobile manufacturer headquartered in Yokohama, Japan, has been a driving force. Renowned for its innovation, Nissan has consistently pushed the boundaries of automotive technology, delivering stylish and reliable vehicles.

How to read and clear your codes

However, in the intricate world of automobiles, your Nissan is not exempt from dashboard warning lights. One of the most common is the Check Engine Light (CEL), often perceived as an ominous harbinger of mechanical woes. While it’s true that CEL can signal underlying issues, plenty more lights could illuminate your dashboard, including ABS, SRS, Transmission temperature, Oil pressure, battery charging, Differential, Traction control, and many more. However, it’s not always a cause for panic.

OBD stands for “On-Board Diagnostic”. Most modern vehicles now include an OBD port, which can be utilized by a scanner that communicates to your vehicle. It is plugged in by an OBD-II scanner into the socket designed to help automotive technicians erase codes, interpret faults, and other issues that your Nissan may be experiencing or have recorded. All Nissans have an OBD-II port; some common models include Altima, Pathfinder, GT-R, 370z, Titan, Almera, and many more. Click here to learn about your Nissan’s dashboard lights. Moving on, here are the steps on how to read DTCs or Fault codes:

1. Gather the necessary tools: Equip yourself with a Professional-Grade OBD-II Scanner compatible with your Nissan. Click Here for our Professional-Grade YOUCANIC Scanner
2. Access the OBD-II Port: This port is usually found under the dashboard, near the steering column; the OBD-II port is the gateway to your car’s diagnostic information. Turn the ignition key to the “ON” position without starting the engine to make a connection with the vehicle’s computer. If your Nissan has a START/STOP feature, press the button without pressing the brake pedal. Do not start the engine. If you are unsure of the OBD-II port of your vehicle, you can always check the Car Owner’s Manual.
3. Access the Diagnostic Menu: On the YOUCANIC scanner’s display, navigate to the “Diagnostic” or “Scan” menu. This menu allows you to access various diagnostic functions for your Nissan.
4. Select ‘NISSAN’ as the Vehicle Make: This ensures the scanner effectively communicates with Nissan’s On-Board Diagnostic system and effectively scans the fault codes.
5. Select option for model selection: The scanner has various options; you can choose SmartVIN to detect your vehicle automatically. However, you choose Manual Selection if SmartVIN does not work as intended.
6. Select the Specific Model and Chassis: After selecting the vehicle make, scroll through the available models and select the correct one for your Nissan. Choose the corresponding chassis or body type to properly sync the scanner to your vehicle.
7. Select Control Units: Once you have selected the model and chassis, the scanner will let you choose between “Quick scan” or “Control Modules.” Control Modules display a list of control units or modules in your vehicle. Examples include the engine control module (ECM), transmission control module (TCM), and ABS control module. Choose the specific module you want to diagnose. Otherwise, you can also choose the  “Quick Scan” to check everything.
8. Interpret the Codes: Once the YOUCANIC scanner completes the code retrieval process, the displayed codes will provide information about specific issues detected by the control unit. Note these codes for further analysis and diagnosis. Each DTC consists of a letter and four numbers. The letter indicates the system affected, while the numbers describe the issue more specifically. Click here to learn more about fault codes.
9. Erase Codes: After the problem has been repaired, return to the scanner’s menu and select the option to “Erase Codes” or “Clear Codes.” This action removes the stored fault codes from the control unit’s memory, indicating that the problem has been resolved. Please note that you may or may not erase a code when the issue is not fixed.

NOTE: These pictures are just the demo of our YOUCANIC Scanner, it may or may not be exactly the same

DIY vs. Mechanic: Making the Smart Choice for Your Car

Whether to tackle DTCs yourself or seek professional assistance depends on your mechanical aptitude and the issue’s complexity. If you’re a seasoned DIY enthusiast with a well-stocked toolbox, you might be able to handle minor to complex issues; it’s essential to recognize the limitations of self-diagnosis. However, for more intricate problems, it’s wise to entrust your Nissan to the expertise of authorized Nissan technicians. You can also check our article here if the check engine light stays on in your Nissan.

Check our article here if you want to know what is the best OBD-II for DIY Enthusiasts: Best OBD2 Scanner For DIY Auto Repair – YOUCANIC.

Decoding the Enigma of DTCs

DTCs are standardized codes that follow a specific format, providing valuable insights into the nature of the problem. The first character indicates the type of system (P for powertrain, B for body, C for chassis, and U for network comm.), followed by four digits. The first digit identifies the system, the second digit denotes the subsystem, and the last two digits pinpoint the specific fault.

For instance, a DTC starting with P01 would indicate a powertrain issue related to fuel or air metering. Further, a code like P0171 would point to a lean air-fuel mixture.

Is it important to scan my vehicle myself?

Regular scanning offers several benefits:

• Early Detection of Issues: DTCs can alert you to potential problems before they cause noticeable symptoms, allowing for timely intervention.
• Improved Fuel Efficiency: Addressing underlying issues can enhance fuel economy, saving you money at the pump.
• Extends the Vehicle Lifespan: Promptly addressing faults can prevent further damage and prolong your Nissan’s lifespan.

Regular scanning as a preventive checkup for your Nissan is like visiting your doctor annually. Your Nissan deserves regular attention to keep it running smoothly and safely.

If you want to know the best OBD-II Scanner for your Nissan, check out our article here.

Why Can’t I Clear My Nissan’s Error Codes? Understanding the Issue

Once you’ve identified the DTCs, you may be tempted to clear them, hoping to continue driving your Nissan, and the problem magically disappears. While clearing the codes can temporarily remove the “Check Engine” light, it doesn’t address the underlying issue. It will always come back. Here are also some lists of why you cannot clear the codes of your Nissan:

• Use a Professional-Grade Scanner: Ditch the generic scanner and upgrade to a professional-grade like YOUCANIC. Generic scanners are like trying to open a Ferrari with a Ford key – it won’t work! YOUCANIC, on the other hand, is like the master key to your Nissan’s diagnostics, unlocking hidden diagnostic powers and letting you clear codes that would otherwise remain stubborn and hidden.
• Underlying Issues: Before clearing fault codes, remember to address the underlying issue that triggered them in the first place. Clearing codes is like patching a leaky pipe without fixing the cracked valve – it’s just a temporary fix. The ‘check engine’ light will surely come back and haunt you.
• Continuous Fault Monitoring: Like the SRS system, certain fault codes may be cleared by disconnecting the battery (like a reset). However, they will reappear even after clearing until the root cause is resolved. This is a persistent reminder to fix the problem, not just mask it.
• Proper Clearing Procedure: Following the correct steps outlined in your diagnostic scanner’s user manual is essential to clear fault codes effectively. If unsure about the clearing procedure, consult a professional for guidance specific to your scanner and Nissan model.

Check our YOUCANIC Scanner:

YOUCANIC Full System Car Diagnostic Scanner

The Risks of Ignoring Vehicle Fault Codes: What You Need to Know

Ignoring DTCs can lead to a cascade of issues.

1. Performance: Over time, unaddressed faults can lead to decreased performance, reduced fuel efficiency, and increased emissions.
2. Safety Hazard: Ignored DTCs can pose safety risks, particularly related to critical systems like brakes or airbags.
3. Costly Repairs: Putting off repairs can result in more extensive damage, such as damage to your transmission, leading to higher repair costs in the long run.

Frequently Asked Questions

References

1. What Is an OBD2 Scanner and How Does It Work?
   What Is an OBD2 Scanner and How Does It Work? | The Drive
2. DTC Fault Codes
   DTC Fault Codes – YOUCANIC
3. What Does the Check Engine Light Look Like, and What Does It Mean?
   What Does the Check Engine Light Look Like, and Really Mean? – Consumer Reports
4. Current / Stored / Active / Past / History Fault Codes Explained
   Current / Stored / Active / Past / History Fault Codes Explained – YOUCANIC
5. A Guide to Understanding DTC Codes
   A Guide to Understanding DTC Codes (samsara.com)

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