Golf IV R32 :: Rapid Deceleration After Taking Foot Off The Gas - Getting Code P3801


Jul 16, 2013

Today I noticed that it feels like my R decelerates rather quickly as soon as I take my foot off the gas. In my old GTI, it seemed that it would glide in whatever gear I was in for a while. In this, however, It seems to slow down VERY quickly if I am not pressing in the accelerator.

Am I just crazy, or could this be an actual issue? My only thoughts are that the emergency brake cable is too tight and the brake is stuck on a little bit? Any thoughts?

I do have a CEL on from code P3801, which I read is most likely the ECT sensor. I know this may cause a loss of gas mileage, but could this be the culprit of this (almost) issue?

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I believe this pipe feeds air from the intake manifold to charge the brake booster? If this was the case, I thought possible by hitting the brakes harder than usual the back pressure at the check valve was enough to burst the plastic pipe, which may have been heated, stressed already? Then the vacuum leak caused the CEL?

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