Check light
Hi there: 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.
DTC P0402 - Exhaust Gas Recirculation Flow (EGR) Excessive Detected
Symptoms
Causes
Possible Solutions
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i believe it's a egr system code
I got a 406 witch is egr flow sensor A high voltage
I hope that helps your search
SOURCE: Failed Emision test
po442 is evap emission control system leak (small) 1 of the lines for emissions is leaking. po455 is-- emission control system leak (large). turn off light with code scanner after it is fixed.
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