Common Renault Fault Codes and How Diagnostic Tools Can Help

Founded in 1899 by Louis Renault, the first car, the Renault Voiturette 1CV, could climb hills. With a long history of innovation, they are one of the top car manufacturers in the world today. But, with complex electronics and sensors to make it run smoothly, Renault cars, like all modern cars, have a system that triggers a fault code to help you identify the problem. These codes are key to diagnosing and fixing issues quickly.

Modern Renault cars have an onboard diagnostic system, known as OBD-II, but many new owners are not aware of how to use it to detect problems with the engine, transmission, or emissions. If you are one of them and are looking for an expert blog that has the principal Renault engine fault codes explained, you are in the right place.

So, in this blog, we will show you how to read the OBDII screen, what happens if you ignore the signs, and other expert tips from Global Diagnostics. Keep reading to find out.

But first,

Let’s get to know more about the Renault Engine Fault Codes:

• P-codes: These codes are related to Powertrain (engine and transmission).

• B-codes: These codes refer to Body (airbags, seat belts).

• C-codes: These codes involve Chassis (steering, brakes).

• U-codes: Finally, these U-codes are for Network communication issues. (Keep reading to check out more codes in detail) 

How Does a Fault Code Reader Help?

First things first, a code reader will help you scan and repair Renault issues. When you use a fault code scanner, it: 

• Instantly informs you if something is wrong with your car. 

• It detects problems at an earlier stage before the condition of the vehicle deteriorates. 

• OBDII scanners can be connected to your smartphone, allowing you to get updates from anywhere around the globe. 

• Code readers help you track its maintenance, starting from its performance, service reminders, and fuel economy. 

What Happens When You Ignore Engine Fault Codes?

When you ignore the engine fault codes, you invite unwanted consequences and safety concerns your way. Not taking these codes seriously can lead to: 

1. Engine Failure

If you ignore these signs, it can misfire. If you ignore it for too long, it can overheat, damage pistons, or cause an engine breakdown.

2. More Expensive Repairs

What starts as a minor issue, like a faulty spark plug, can lead to catalytic converter damage. So when you ignore the signs and don’t get it fixed on time, it can cost you more than you expect.

3. Failed Emissions Test

If you ignore the check engine light, you’ll likely fail your MOT or emissions test and get fined in your city.

4. Safety Risks

As we mentioned, ignoring the CBDII signs can also lead to Issues like ABS faults or steering angle errors, which can compromise your control over the car and put lives at risk.

5. Reduced Fuel Efficiency

Sensors play a key role in maintaining the correct fuel-to-air ratio. When you don’t check for the signs and ignore regular maintenance, Faults may result in excessive fuel use.

(Also read from our previous blogs: The Essential Guide to Car Diagnostic Tools) 

How to Read the Scanner?

Step-by-Step:

1. Find the OBD-II port under the dashboard (usually beneath the steering wheel).

2. Plug in the scanner while the engine is off.

3. Then turn to the ‘On’ position without starting the engine.

4. After you have done so, the Renault OBDII scanner will start reading the codes.

5. You can also use the scanner’s interface or a connected mobile app to view the error codes.

6. The best way is to save the codes to search for their meanings or share them with your mechanic. You can also write the code down manually to better understand it. 

7. Some tools allow you to clear the codes once the issue is resolved.

Common codes:

1. P0170: Malfunction in Fuel Trim 

2. P0401: Insufficient EGR Flow 

3. P0606: Fault in ECM/PCM processor 

4. P0100: Fault in MAF 

5. P0300: Misfire in Random Cylinder
   
   

Bottom Line

Now that you have the major Renault engine fault codes explained, it is more beneficial to always consult an expert, especially a mechanic who can help you figure out the problems and fix them before it's too late. Apart from that, you can always reach out to us for help with common issues with Renault vehicles. 

Contact us here.