What Is An EGR Valve? EGR valves are a common point of failure on most modern diesel engines. When the valve sticks, it triggers the check engine light and decreases power. Simply replacing the valve isn’t enough to protect your engine, since failure is usually caused by problems with ot...
The EGR valve is an essential component, but what does it do? Today we will talk about EGR valves. We will explain how they work, describe different types of this part, and discuss how you can spot a faulty or failing one. How Does The EGR Valve Work? Nitrogen constitutes about 80 ...
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Turn the vehicle off and remove the key from the ignition. Allow the EGR valveample timeto cool down. Step 2 Open the hood and locate the EGR valve. The valve is mounted on the exhaust manifold. Refer to your vehicle repair manual for exact location and a diagram. Step 3 Turn the mul...
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P0401: This code signifies a reduced flow of recirculated exhaust gases into the intake manifold resulting from a faulty EGR valve. P0402: The EGR Flow Excessive Detected code means there is too much recirculated exhaust gas flowing through the system. P0403: When you see this code, your...
EGR Valve At idling, theEGR valveis in the closed position because of the spring pressure and lower ported vacuum. The engineers designed it so because if the exhaust gases recirculate at the idling, then it would cause rough/erratic idling. Upon opening of the throttle applies the ported vac...
For example, multiple sensors or actuators can cause an engine surge when there is a fault in the following components: TheEGR valve An oxygen sensor Throttle position sensor (TPS) Manifold overpressure sensor (MAP) Vehicle speed sensor (VSS) ...
(1) TheEGR valvethat is not working. The EGR valve is supposed to open when the engine is accelerating or lugging under a load. This allows intake vacuum to suck some exhaust in through the EGR valve to dilute the air/fuel mixture slightly. This lowers combustion temperatures and prevents ...
However, the most common causes are a loose gas cap, a bad EGR valve, a bad MAF sensor, a bad oxygen sensor, a worn-out catalytic converter or a bad ignition coil. 1. Loose Gas Cap The gas cap helps create a seal to keep fuel fumes at bay. If the gas cap is loose, cracked...