![]() ![]() Once the noise starts, it will not go away unless I give the car gas or release the gas pedal. We can only listen to it when the conditions we mentioned are met and reach a cruising speed, which means I’m very steady on the gas, usually just under the central line in the eco range. When the car travels between 20-60km/h and the EV light is off, we can hear a clapping sound. We brought it to Toyota for an inspection and a battery check. The car has a 1.8 gas engine and 227,000 km. Hello, we recently bought Toyota Auris 2015 hybrid. Cleaning is much cheaper than replacement, so it is prudent to react immediately to all warning lights. If the fault code displayed by the diagnostic equipment relates to exhaust gas recirculation, the likelihood is that the valve will need to be either cleaned or replaced. Return the car to your main dealer to be checked. What do I need to do if I see the engine check light illuminate? These symptoms may include rough idling, hesitance in acceleration and a loss in fuel economy. How can I tell if the EGR valve in my car is failing?Ī failing EGR valve will affect the performance and economy of your engine, though it is likely that the ECU will notice the issue and alert the driver through a dashboard warning light before any physical symptoms are experienced. Constant use of any vehicle in low-speed, urban environments with frequent stops will accelerate the amount of soot collecting around the EGR valve. It is possible to mitigate this by ensuring the vehicle is regularly driven at sustained speeds above 40mph. Its location within the direct path of flowing exhaust gases means that soot can accumulate around the EGR valve and block its free movement. This increases the time period between regeneration procedures and the service life of the DPF itself. The neutralising of NOx soot within the combustion chamber reduces the quantity of this material heading into the diesel particulate filter (DPF) installed further down the exhaust system. Does the work of the EGR valve relate to the function of the particulate filter in diesel engines? In addition, the reappearance of spent exhaust gases within the combustion chamber enables the engine to neutralise these particulates through secondary burning. Routing exhaust gases back into the combustion chamber also lowers combustion temperatures, but the primary benefit is the reduced formation of nitrous oxide (NOx) particulates. In diesel engines, the role of the EGR valve is even more important. This allows the engine control unit (ECU) to dilute the air/fuel mixture and reduce petrol consumption. ![]() In petrol engines, it helps to lower combustion temperatures and reduces the chance of spontaneous combustion, also known as knock. The process of recirculating precise quantities of exhaust gases back into the combustion chamber has a number of advantages. This occurs when the correct engine operating conditions are met and, in turn, serves to reduce harmful emissions. The EGR valve in your Toyotais fitted within the exhaust system and allows some of the gases produced during the combustion process to be re-burnt within the combustion chamber for a second and more effective time. What is an exhaust gas recirculation (EGR) valve? ![]()
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