Renault EGR valve replacement

Frequently Asked Questions

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Does the EGR Valve on My Renault Need Replacing?

The exhaust gas recirculation (EGR) valve recirculates a portion of the exhaust gas that would normally go through your Renault's exhaust system and mixes it in with the fresh air inside the intake manifold. These gases are then burned off as they pass back through the combustion process.

Reducing the volume of emissions going through an exhaust system lengthens the life of a catalytic converter and helps the environment, and most modern Renault's have either an external or internal EGR valve.

The EGR valve is a vacuum or electric-controlled unit that is bolted onto the engine. Exhaust gases travel through pipes entering one port of the EGR and then exit out another port into the intake manifold.

On an internal EGR, various methods are utilised to recirculate the exhaust gases to be part of the combustion process.

An EGR valve can fail when it loses vacuum, the diaphragm is perforated, it is full of gunk, or the valve gets stuck open. When this happens the EGR valve will need to be replaced. With electric EGR valves, the problem could be an issue with the wiring.

Symptoms of a faulty EGR:

Scan tool shows EGR error code

Service engine light on

Engine misfire

Engine vibration

When your EGR valve fails, the check engine warning light will usually illuminate on the dash and your Renault may run rough. The engine may run lean or rich, depending on why the valve has failed.

If left for too long a faulty EGR valve can lead to permanent engine damage. Best to get it replaced as soon as possible to avoid further complications and expenses.

You may also want to consider periodic carbon cleaning of the EGR valve. If cleaning is not an option, it will need to be replaced.

If your looking for a top mechanic to replace your Renault EGR valve book the best through AutoGuru.