The EGR valve and the various engine sensors (MAP, MAF, lambda) are essential components for the correct functioning of a modern vehicle. Over time, however, they tend to get dirty due to combustion residues, resulting in a drop in performance, increased consumption and the engine warning light coming on. In this article, we discover which cleaners to use , how to clean them and how to save money by avoiding expensive repairs .
What is the EGR valve and why does it get dirty?
The EGR (Exhaust Gas Recirculation) valve is used to recirculate part of the exhaust gases inside the combustion chamber, to reduce nitrogen oxide (NOx) emissions. Over time, however , soot, carbon and oily residues accumulate, compromising its operation.
Symptoms of a dirty EGR valve:
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Loss of power
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Irregular acceleration
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Increased consumption
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Engine light on
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Black smoke from the exhaust
Which cleaners to use for EGR and sensors
1. EGR cleaner spray
A specific product, easy to use, ideal for cleaning without dismantling the valve. Spray into the intake air duct with the engine hot and running.
Recommended products :
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Wynn's EGR 3 : effective and compatible with diesel and petrol engines.
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Valvoline EGR Cleaner - Great for removing carbon and deposits.
2. MAF/MAP Sensor Cleaner
The air sensors (MAF - Mass Air Flow / MAP - Manifold Absolute Pressure) detect the flow and pressure of the air. Dirt alters the values, causing the control unit to work poorly.
Recommended specific cleaner :
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CRC Mass Air Flow Sensor Cleaner : safe even on delicate plastics and components.
3. Suction circuit cleaner
Products for cleaning the entire intake duct, useful in modern diesel engines.
Examples :
How to clean safely
⚠️ Always consult your vehicle's workshop manual or seek professional advice before proceeding.
EGR cleaning without disassembly:
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Bring the engine to operating temperature.
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Connect the spray to the suction (via tube or flow meter socket).
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Spray at intervals, keeping the engine slightly accelerated (2000-2500 rpm).
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Complete the cleanup by driving 10-15 km on the road.
Cleaning MAF/MAP sensors:
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Gently remove the sensor.
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Spray the specific cleaner and let it evaporate (do not use compressed air).
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Reassemble only after complete drying.
How to save on EGR and sensor cleaning
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🧼 Periodic cleaning : using cleaners every 15-20,000 km helps keep the system efficient.
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🔁 Avoid early replacement : a new MAF sensor can cost over €100, while a cleaner costs less than €20.
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📦 Buy products online from reliable retailers : on Autoricambi Tritella you will find the best EGR cleaners and sensors at discounted prices.
Frequently Asked Questions
How often should the EGR be cleaned?
Recommended every 20,000-30,000 km, especially if you often use the car in the city.
Can I clean the EGR even if I have a FAP?
Yes, but be careful: a dirty EGR can also negatively affect the particulate filter.
Is it risky to clean the EGR valve yourself?
If you follow the instructions and use specific products, it is a job that even non-mechanics can do.
Where can I buy the best EGR cleaners and sensors?
You can find them on Autoricambi Tritella , your point of reference for professional spare parts and additives.
Conclusions
Cleaning the EGR valve and sensors such as MAF and MAP is a simple, inexpensive and useful operation to improve the performance of the vehicle and reduce consumption . Using the right cleaners and following preventive maintenance is the secret to saving and avoiding costly breakdowns.
