My 2001 Jetta GLS has a CEL that came on a few weeks ago, but the car drove fine. Then the glow plug light came on shortly after starting the car. One of the two began to flash, so I took it to Las Cruces, NM dealership. They found a glow plug preheater wire (is this part of the GP harness you guys are referring to??) that appeared to be cut. (Morrris Auto Group VW in Anchorage, AK was the last place I took it to, suspect they are up to no good.) Well, Las Cruces repaired the wire, saying a new wire set/harness would cost me $600, so this simple wire repair may work. It did, but now the CEL is back. Car still drives fine.
I'll see if the local Autozone can scan it, but those of you with VAGCOMs, what does it cost and where's good place to buy them? Also, any other ideas why the CEL keeps coming on? The previous time (9 months ago) it was a MAF gone bad. The car now has about 63,000 miles.
Miyagi