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Symptoms Of A Failing EGR Valve

Failing EGR Valve

Here at ACC UK Ltd, multi award winning Independent Volvo and Toyota Service, Repair & MOT garage based in Farnborough, Hampshire, we like to bring you handy hints and tips on how to maintain your Volvo or Toyota and how to save money on your annual car running costs. We also like to keep you informed of changes to laws relating to driving and car ownership.

The blog this week is about the tell tale signs to look out for when it comes to a problem with your ERG Valve in your Toyota or Volvo. Read on to find out more:

So what exactly is the EGR valve? And what role does it play? The EGR Valve plays a vital role in regulating your Volvo or Toyota exhaust emissions.  

To reduce the amount of NOx pollutant emitted from your Volvo or Toyota, the exhaust gases need to be cooled before being emitted from your vehicle. In order to achieve this, they are introduced back into the combustion chamber via the exhaust gas recirculation (EGR) valve; this reduces the temperature and thereby inhibits the production of NOx emissions.

Basically, when the EGR valve is open the exhaust gases are allowed through the EGR system to help control vehicle emissions, however, when the valve is closed exhaust gases can’t pass through the EGR system. Recirculation only occurs when your car is at a working temperature. This helps to ensure your car maintains fuel efficiency and emits fewer emissions into the atmosphere.

A faulty EGR valve can lead to performance issues including a reduction in power, reduced acceleration and decreased fuel efficiency. It can also cause vehicle emissions to increase. What happens is that the EGR valves can become stuck ‘open’ or ‘closed’ due to a build-up of soot particles, carbon deposits and dirt from fuel. Town driving is one of the biggest culprits as your car never really achieves the required temperatures in order to complete a regeneration. You may have seen whilst on a motorway a big puff of black particles coming from the exhaust of the car in front of you? This is the build up being emitted from the system. Over time these particles keep being added to and then the pipes or valves become clogged.

Some of the tell tale signs of an issue are:

  1. Your Volvo or Toyota has poor performance
  2.  Increased Fuel consumption
  3. You have a rough idle when first starting your Volvo or Toyota
  4. Your Volvo or Toyota may stall frequently when idle
  5. Your Engine Management Light is illuminated on your dashboard
  6. You may start to smell fuel as it does not all burn off
  7. You may hear knocking noises in the engine
  8. High emissions upon testing

The best thing to do is take your car for a long run on the motorway to try and clear the EGR if this does not work then you will have to take your Volvo or Toyota into your local independent garage for further investigation. Do not ignore this issue as it will only get worse until your car does not work at all or has gone into limp mode. Happy safe motoring folks!

Here at ACC UK Ltd, Winners of The Motor Trader Independent Garage of The Year 2015 and 2019, The Inspire Customer Service Excellence 2016 Award, The Eagle Radio Customer Focus 2017 Business Award, The Workshop Magazine Workshop Manager of the Year 2017 Award, The LiveWire Excellence In Vehicle Servicing 2019 Award and The Aftermarket Excellence Award for Best Website 2019, The Eagle Radio Biz Award – Entrepreneur of the Year 2020,  SME News Magazine Most Trusted Car Servicing Provider 2020, we pride ourselves on offering an outstanding customer experience for a fraction of the cost of a dealership. Give us a call and let us quote you for your next service or repair on your Volvo or Toyota. We service all areas around Farnborough, Fleet, Aldershot, Farnham, Guildford, Frimley, Camberley, Hook, Sandhurst, Crowthorne, Yateley, Hampshire and Surrey. We offer free collection and drop off services. We also have a fleet of courtesy cars to allow you to get on with your schedule whilst your Volvo or Toyota is with us. Happy Motoring from all at ACC UK Ltd – Independent Volvo & Toyota servicing, repair and MOT specialists based in the heart of Farnborough, Hampshire.