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How to Reset Check Anti-Pollution System Renault


How to Reset Check Anti-Pollution System Renault



We've all been there. Driving peacefully and suddenly a message flashes on your car dashboard saying, "Check Anti-Pollution System." It's alarming, isn't it? So, what does it mean and how can you reset it? Let's delve into it!

What Does "Check Anti-Pollution System" Mean?

The Anti-Pollution System in a Renault vehicle aims to reduce harmful emissions. Components involved usually include the exhaust, catalytic converter, and various sensors. When you see this warning message, it's an indicator that something isn't working as it should.

Signs That You Need to Reset the Anti-Pollution System

Look out for these symptoms:

  • Poor engine performance
  • Odd smells from the exhaust
  • Warning lights on the dashboard

Legal Implications of Ignoring the Warning

Ignoring this warning could lead to fines or points on your driving record, not to mention the environmental impact.

Consult the Owner's Manual

Your owner's manual is a treasure trove of information. Always check it first for any advice on resetting the anti-pollution system.

DIY Steps to Reset the Anti-Pollution System

Resetting the Anti-Pollution System yourself is a viable option if you're a bit of a car enthusiast or just keen to learn. However, diving headfirst without taking proper precautions could spell trouble. Here's a more detailed step-by-step guide to ensure you tackle the issue safely and effectively.


Before you even lift the bonnet, make sure you're in a safe environment. Park your car on a flat surface, turn off the engine, and disconnect the battery. This is vital because working on an electrical system with the battery connected could result in short circuits, not to mention the personal safety risks involved.

Tools Needed

Arm yourself with a set of basic tools like screwdrivers, spanners, and a pair of gloves for protection. Most importantly, an OBD-II scanner will be your best friend during this process. This tool can read fault codes from your car's computer, helping you pinpoint the issue.

Identify the Fault Code

Connect the OBD-II scanner to the port usually found under the dashboard. Turn your car's ignition on but don't start the engine. The scanner should display fault codes. Look for the codes related to the Anti-Pollution System and note them down. Some common codes are P0401, P0402, and P0420, among others.

Clear the Codes

After identifying the fault codes, you have the option to clear them. This will reset the warning light on your dashboard. However, if the issue is not resolved, the warning light will come back on sooner or later.

Disconnect the Battery

If you haven't already, disconnect the battery for about 15 minutes. This will allow the car's computer to reset, potentially clearing the fault if it's not a severe issue. Reconnect the battery and start the car to see if the warning has disappeared.

Re-scan with OBD-II Scanner

Once the battery is reconnected and the car is running, use the OBD-II scanner again to see if the fault codes have cleared. If they have, great! You've successfully reset the Anti-Pollution System. If not, you may need to seek professional assistance.

Remember, while resetting the Anti-Pollution System yourself can save money and time, if the warning light reappears, it's a signal that a deeper issue exists. In such cases, it's highly advisable to consult a professional to avoid causing more damage to your vehicle.

Professional Assistance

If DIY solutions don't work, it's time to consult a mechanic.

When to Contact Renault Support

Sometimes, the issue may be due to a software glitch. In such cases, contacting Renault customer service may solve the problem.

The Role of Software in Modern Cars

Cars have evolved into more than just mechanical machines; they're like computers on wheels. This is particularly true for the anti-pollution system.

Future-Proofing Your Renault

To prevent future issues, ensure you're carrying out regular maintenance and keeping your vehicle's software up to date.

The Importance of Regular Check-ups

Regular check-ups can help prevent issues from arising and save you money in the long run.

Alternatives to Resetting

If resetting doesn't resolve the issue, you may need to replace some components like the catalytic converter or sensors.

Common Mistakes to Avoid

Don't overlook warning signs or jump into DIY solutions without proper knowledge. This could exacerbate the problem.


Resetting the "Check Anti-Pollution System" in your Renault isn't something to take lightly. Whether you go the DIY route or seek professional help, it's crucial to act swiftly to keep your car running smoothly and stay on the right side of the law.


  1. What is the Anti-Pollution System in Renault vehicles?

    • It's a system designed to reduce harmful emissions.
  2. Can I reset the system myself?

    • Yes, but always take necessary precautions and consult the owner's manual.
  3. When should I contact Renault customer service?

    • If you suspect the issue might be due to a software glitch.
  4. Is ignoring the warning message a big deal?

    • Yes, it can lead to legal consequences and harm the environment.
  5. Can regular check-ups prevent this issue?

    • Regular check-ups can help identify problems before they escalate.

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By Ollie SEO
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