Have a code 71 on my car, I know it means EGR but what exactly with the EGR? Does anyone know? I've replaced the hoses that attached to the EGR modulator, replaced the EGR modulator, and even sprayed carb cleaner to clean out the EGR Valve - light is still on. I was told to either replaced the EGR valve or some temperature thing that goes into the air filter. Also, I used to get about 34 miles/gallon, now I'm getting about 29, car 'bucks' sometimes as well, feels like it's pushing to go forward but resisting (happens only once in a while). Any suggestions?