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P0404 error

EGR error

AdBlue error

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DEF error

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P0404 EXHAUST GAS RECIRCULATION CIRCUIT RANGE/PERFORMANCE – FAULT CODE MERCEDES

Live Examples Of Errors
What errors usually look like
The P0404 code, also known as the “Exhaust Gas Recirculation Circuit Range/Performance” error, is a common issue faced by many Mercedes owners. This code appears when there is a problem within the Exhaust Gas Recirculation (EGR) system, which may be due to a malfunctioning valve, sensor, or a related component. When this happens, the check engine light comes on, indicating that there is an issue that needs addressing. Our error removal solution allows you to clear the P0404 trouble code from your dashboard without needing to replace or remove any parts, providing an easy way for you to continue driving without costly repairs.

What Does the P0404 Mean?

The P0404 code indicates a problem within the EGR circuit. The recirculation EGR system is responsible for directing a portion of the exhaust gases back into the cylinders, which helps reduce emissions. When the EGR valve or its related components do not function correctly, the vehicle’s powertrain control module detects the issue and stores the P0404 trouble, leading to the activation of the engine light. The P0404 Exhaust Gas Recirculation Circuit Range/Performance fault can occur for a variety of reasons, which we’ll cover below.

Causes of the P0404

The P0404 code can be triggered by several different causes. Some of the most common reasons for this diagnostic trouble include:
  • Carbon Buildup: Over time, carbon can accumulate in the EGR valve, preventing it from functioning correctly. This often requires cleaning the EGR valve.
  • Faulty EGR Valve: The EGR valve itself may be damaged or worn, which means it cannot open or close correctly.
  • Wiring Issues: Faulty or corroded wiring within the EGR circuit can prevent the valve from functioning properly, resulting in the P0404 trouble.
  • Defective Sensor: A sensor within the recirculation EGR system may provide incorrect data, leading to the P0404 being stored.

Symptoms of the P0404

When the P0404 code is triggered, several symptoms may appear, including:
  • Check engine light is on.
  • Rough engine idle or poor acceleration.
  • Reduced fuel efficiency.
  • Excessive exhaust emissions.

How Our Error Removal Solution Works

Our error removal solution provides an easy and effective way to clear the P0404 from your Mercedes. Instead of replacing components like the EGR valve or sensors, this tool can be plugged into your vehicle’s OBD-II port to communicate directly with the engine control unit. It recalibrates the EGR system and clears the trouble from the vehicle’s dashboard, allowing you to drive without interruptions. The solution works by testing and recalibrating the input data from the EGR circuit to ensure that it is functioning correctly. Whether the issue is due to a clogged valve or faulty sensor, the tool effectively clears the code and allows you to continue using your vehicle without replacing expensive parts.

How to Use the Error Removal Tool

Using our error removal tool is simple and efficient. Here’s how to get started:
  1. Locate the OBD-II port in your Mercedes, usually found under the dashboard on the driver’s side.
  2. Plug in the tool and let it scan for active trouble codes, including the P0404 Exhaust Gas Recirculation Circuit Range/Performance code.
  3. Follow the instructions provided to recalibrate the EGR circuit and clear the P0404.

Why Choose Our Solution?

Our error removal solution offers several advantages for Mercedes owners experiencing the P0404, including:
  • Cost Savings: Avoid replacing costly components like the EGR valve and related sensors.
  • Quick Installation: No technical expertise required—simply plug the tool into the OBD-II port and follow the instructions to clear the code.
  • Reliable Results: Clear the check engine light and restore your vehicle’s performance to its optimum state.

Common Questions About the P0404

Many owners wonder whether they must replace their EGR valve when they encounter the P0404. The good news is that replacing the valve may not always be necessary. Our tool allows you to reset the system without replacing components, saving both time and money. Cleaning the EGR valve may be another step that helps maintain its efficiency, but it is not always required for fixing a P0404. Another common question is how long the fix will last. The effectiveness of our solution depends on the overall condition of your EGR system. For vehicles with moderate carbon buildup or minor wiring issues, our tool can provide a lasting fix. However, for more significant mechanical problems, other repairs may be necessary at a later time.

Avoid Costly Repairs and Downtime

Replacing or cleaning the EGR valve can be costly and time-consuming, often requiring a full day of work at a mechanic’s shop. With our error removal tool, you can avoid these costly repairs, skip the hassle, and get back on the road. The tool is designed to be user-friendly, making it accessible for any vehicle owner to take control of their vehicle’s maintenance without relying on expensive services.

Compatibility and Purchase Information

Our P0404 error removal solution is available for a range of Mercedes models. The tool can be purchased directly from our site, and we offer shipping within the USA, Canada, and internationally. Our product is shipped quickly and includes detailed instructions to ensure a simple and successful installation process. All our products are tested for quality, and we ensure that each unit provided meets the highest standards of performance. When you purchase from us, you are buying a reliable, efficient solution to help you maintain your Mercedes without incurring high repair costs.

Conclusion

The P0404 Exhaust Gas Recirculation Circuit Range/Performance code can be frustrating to deal with, especially when it means spending time and money on costly component replacements. With our error removal tool, you can easily clear this code from your dashboard, saving time and money while ensuring your vehicle continues to run smoothly. If you want a fast, reliable way to fix the P0404, our solution is here for you. Shop for our error removal tool today and keep your Mercedes performing at its best without unnecessary downtime.
Check Your Dashboard

Have you ever seen such lights?

If yes, then they are most often caused by a problem with P0404 error
Also Known As

The most common errors

Exhaust Fluid Reserve!
Refill Exhaust Fluid!
15 Starts Remaining!
Engine Start not possible in *** km (mi)!
Cannot measure fluid level!
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SCR ADBLUE / DEF DELETE

SCR total delete – no longer necessary to repair the SCR system and refill the AdBlue fluid

Whats include?
Completely remove Check Engine error
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ADBLUE (DEF) COUNTER RESET

Temporary solution – start the engine and drive to workshop without limitations but the SCR still needs to be repaired

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SCR system continues to work
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What you'll run into without our module

You might not see them coming, but additional issues are often part of the package. It's the heads-up every customer needs.
Dealers delay
Waiting on car parts from a dealer? Brace for delays. Parts often aren't in stock, and delivery dates can shift, leaving you hanging.​ Dozen of surprises.
Wasting money
Repair expenses hit hard. High costs for parts and labor, plus dealer markups, and downtime mean losing more money. It's a major financial issue for truck owners.
Repair downtime
Bracing for repairs? Parts and labor are pricey, and there's always a chance of finding more issues, especially with the exhaust system.
Why better choose package deal
Just a quick heads-up on the headaches our solutions will save you from. Through years of experience, we've nailed down our customers' top issues and crafted the perfect fix for each. A package deal – it's an all-in-one solution.
Exhaust Gas Recirculation or EGR
Soot builds up on the valve, which can interfere with its operation and cause it to fail. Repairs are expensive and difficult. And most often the repair period takes a long time.
AVERAGE COST​
How much you'll save
$2000
+
Selective Catalytic Reduction or SCR
The SCR system consists of a large number of components that can fail. The most expensive breakdown is the DEF level sensor in the tank, as it will require replacing the tank entirely.
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$3000
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Swirl Flaps in the Intake Manifold
Also, soot builds up in the intake manifold, which will interfere with the operation of the flaps. In this case, the entire exhaust manifold will have to be replaced, which is very expensive.
AVERAGE COST​
How much you'll save
$3500
+
Diesel Particulate Filter or DPF
Remove the DPF when it is clogged and only if you don't want to buy a new one, because it is very expensive. In that case we could add coding additionally so you can remove the DPF when the time comes.
AVERAGE COST​
How much you'll save
$5000
+
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SEPARATE CODING OF DPF DELETE OPTION
With this coding, you’ll have the option to remove the DPF from the system.
We advise only removing it if it's fully clogged and replacement or removal is required. Removing it early has no real benefit, so it’s best to wait until it’s truly necessary.
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