IT'S NOT YOUR GRANDPA'S EGR SYSTEM ANYMORE

摘要

Vehicle: Volkswagen with Tier2 BIN5 TDI 2.0L CBEA Diesel EGR System Trouble codes: P047A (DTC 001146) Exhaust Pressure Sensor 2 (G451) Open Circuit P047B (DTC 001147) Exhaust Pressure Sensor 2 (G451) Implausible Signal Let's start with a little background on Volkswagen's new EGR system. To meet the extremely tight Tier2 Bin5 standards for emissions (maximum of 10 milligrams/mile particulate matter and 70 milligrams/mile NOx for diesel vehicles) the new Volkswagen 2.0L CBEA TDI diesel engine uses a complex EGR system in conjunction with a diesel oxidation catalyst + diesel particulate filter (known as the DOC+DPF), a NOx storage catalyst and a H2S (sulfur) catalyst to achieve efficient NOx and particulate matter reduction.