P1402 Lexus EGR Function Open
Possible causes
– The EGR volume control valve circuit harness is open or shorted
– EGR volume control valve leaking or stuck open
– Faulty EGR temperature sensor
– EGR volume control valve leaking or stuck open
– Faulty EGR temperature sensor
Tech description
Start by cleaning the EGR valve, if the code persist it may be necessary to replaced the EGR Valve
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1402 Lexus Description
This system controls flow rate ofEGR led from exhaust manifold to intake manifold. The opening of the EGR by-pass passage in theEGR volume control valve changes to control the flow rate. A built-in step motor moves the valve in steps corresponding to the ECM output pulses. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is determined by considering various engine conditions. The EGR volume control valve remains closed under the following conditions.
– Engine stopped
– Engine starting
– Engine idling
– Low engine coolant temperature
– Excessively high engine coolant temperature
– High engine speed
– Wide open throttle
– Low battery voltage
Lexus Vehicle:Lexus ES,Lexus GS,Lexus GX,Lexus HS,Lexus IS,Lexus LFA,Lexus LS,Lexus LX,Lexus RX,Lexus RX,Lexus SC,Lexus GS350,Lexus GS450H,Lexus IS250,Lexus GX460,Lexus IS350,Lexus LS460,Lexus LS600H,Lexus LX570,Lexus RX350