You should be able to use a blanking plate to mask the problem until the EGR valve fails and generates a engine fault Sent from my SM-G996B using Tapatalk 308 T9 2.0 BlueHDI 180 EAT6 2017, 108 1.0 Active 2014, 208 1.6 e-HDI Feline 2014, DS4 DSport 2.0 HDI 2012, Suzuki RGV 250M 1989 (Money Pit) Here is how to check the manual operation of an EGR valve off a Peugeot 308 2.0 HDI 136. See how the mechanism returns to its seat with no problem. That me Is your EGR valve stuck! The spring at the top electronic part could be broken! This is how to take it apart and put it back together.This is in a response t Peugeot 308 1.6 HDI YEAR 2009 Having had acceleration issues with my car i have as instructed by great members on this forum decided to have the vehicle plugged in to determine what faults are logged. Diagnostic equipment used: Brand Name; Snapon P0490 - EGR Valve Circuit Not Enough EGR, EGR Valve Too Closed in relation to The reference Value. EGR Valve for Peugeot 308 HDi 150 2.0 (06/2011-08/2014) Genuine FUEL PARTS (Fits: More than 1 vehicle) PEUGEOT 307 / 308 / 407 / 607 / 807 / EXPERT MK2 2.0 DIESEL EGR VALVE (Fits: More than 1 vehicle) £169.95. Click & Collect. EGR Cooler for Peugeot 2.0 HDi / BlueHDi - DW10F & DW10C (Fits: More than 1 vehicle) A code P0402 most likely means one or more of the following has happened: -- The DPFE (differential pressure) sensor is faulty and needs to be replaced. -- There is a blockage in the EGR (most likely carbon buildup) -- The EGR valve is faulty. -- The EGR valve may not be opening due to a lack of vaccuum. DCTjc.