Question about Nissan Altima
My check engine light on,i had it check at auto zone.P0440 P0402 code,I replace the egr valve
I know it sounds reduntant but now you need 2 return to autozone and have it rescaned and old codes cleared
Posted on Oct 06, 2009
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Posted on Jan 02, 2017
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Oct 31, 2016 | Cars & Trucks
Electronic Vacuum Regulator (EVR) Control Circuit Malfunction.http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0900c152802600fa click on link to see
Oct 18, 2012 | 1998 Ford Taurus SE
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor (DPF). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0402 code means that OBD detected an excessive amount of EGR.
You may notice drivability problems such as the engine may surge off idle. There may also be other symptoms.
A code P0402 most likely means one or more of the following has happened:
With a P0402, it is common for people to replace the EGR valve, only to have the problem return. The most likely solution is to replace the DPFE sensor.
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