What Is an EGR Valve and What Goes Wrong?
The EGR valve is a common cause of rough running and warning lights. A Cranbourne West specialist explains.
What it is & what it does
The EGR (exhaust gas recirculation) valve routes a little exhaust back into the engine to lower combustion temperatures and emissions. It’s on petrol and diesel engines, but diesels especially suffer from carbon build-up clogging the valve.
When it sticks or clogs, the engine can run rough, lose power, use more fuel, or throw a check-engine light.
Signs of trouble & how we help
Signs of EGR trouble include rough idle, power loss, poor economy, a check-engine light, or excess smoke. Sometimes the valve can be cleaned; sometimes it needs replacing — and the underlying carbon issue should be addressed too.
We diagnose whether it’s the EGR (not another fault), clean or replace it, and advise on reducing the carbon that caused it.
Questions about your car? Just ask.
Understanding what’s under the bonnet makes servicing decisions easier — and we’re always happy to explain what your car needs and why, in plain English.
Book a service or a check with a Cranbourne West specialist online in 60 seconds, or call 03 8782 0711.
What Is an EGR Valve and What Goes Wrong? — FAQ
It recirculates a little exhaust to lower combustion temperatures and emissions.
Carbon build-up (especially on diesels) makes them stick or clog — causing rough running, power loss and warning lights.
Sometimes — otherwise it needs replacing. We diagnose and advise.
Rough idle, power loss, poor economy, a check-engine light or excess smoke.
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