faizul-hasan

Experts here,

Looking for expert advice regarding rough idle and EGR, EVAP failures on my car Audi A4 B6 2004 1.6 engine. I have sporadic rough idle. When I scan, I found two issues.

1. EGR System
   1. Regulation Divergence : P1403 - sporadic 008-Implausible pulse
   2. Potentiometer for EGR (G212): Signal too Low : P1443 - sporadic 007-Short to ground
2. EVAP - failed

When I talk with my service provider (not the Audi agent), they didn't worry about EGR issue and told it is exhaust gas related so to ignore it. They didn't say anything about EVAP (I also forgot to ask it later ). When I study about EGR and EVAP, I found that these two can contribute to rough idle too. I have sporadic rough idle and I have sporadic failures (both I don't like at all). So I feel these two could contribute to the sporadic rough idle my car faces. Interesting thing is that so far I didn't feel this rough idle when the A/C is ON. But my service provider seems they are not interested in fixing these two.

My question is, do I need to worry about these issues and pressure them to fix? Because I feel the sporadic rough idle would be fixed by fixing these two?

Thanks in advanced.