Because of issues with the glow plugs and/or the glow plug wiring harness from the control relay, the Check Engine Light may illuminate. Our technicians tell us there is a service bulletin, not a recall from Volkswagen regarding replacement of the glow plugs on 2004-2005 model years only.
Check Engine Light Due to Issues With Glow Plugs/Wiring Harness on Volkswagen Passat TDI
Average mileage: 132,664 (100,000–165,328)
Exhaust & Emissions affected: 1.9L 4 Cylinder Diesel Turbo, 2.0L 4 Cylinder Diesel Turbo
6 people reported this problem
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2004 Volkswagen Passat TDI 165,328 mi, Visitor
Check Engine light illuminates indicating an emissions issue. Code 2 glow plug problem. Waiting on dealership response.