Engine Light ON (or Service Engine Soon Warning Light)
P2413 2007 HONDA CRV Description
The Exhaust Gas Recirculation (EGR) valve is controlled by the Powertrain Control Module (PCM). When the EGR valve is open, exhaust gas flows from the exhaust manifold through the EGR valve, the intake manifold, and the EGR passage. The exhaust gas is circulated into the air/fuel mixture to lower the combustion temperatures, reducing oxides of nitrogen (NOx) emissions. A sensor (lift sensor) is built into the EGR valve and detects the amount of valve lift. The command value for the target valve lift is stored in the PCM so that exhaust gas recirculation can be optimized according to driving conditions. Comparing this command value with the lift sensor output signal value, the PCM controls the EGR valve to make the amount of actual valve lift equal to the command value. If the valve sensor output is not enough for the commanded valve lift, a malfunction is detected and a Diagnostic Trouble Code (DTC) is stored.
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