2.0L turbo charged engines may develop a hesitation on acceleration and/or illumination of the Check Engine Light due to a failed high pressure fuel pump or a worn camshaft follower or camshaft. Our technicians tell us that whenever the high pressure fuel pump is replaced the camshaft and the follower should be checked for wear. The camshaft lobe pushes on the follower to operate the high pressure fuel pump. Frequent oil changes and use of synthetic oil may help with this wear issue.Google+
Car Problem Reports
Volkswagen Jetta Check Engine Light and/or Hesitation Due to Failed High Pressure Fuel Pump
Volkswagen Jetta Problem
Engine Affected: 2.0L 4 Cylinder Turbo
Average Mileage: 66,870 mi (32,600 mi - 120,000 mi)
Visitor, 2006 Volkswagen Jetta, 2.0L 4 Cylinder Turbo, 120,000 mi
High pressure fuel pump mafunction and cam replacement due to cam wear on the lobe. Took it in due to engine light and had many trouble codes that went with it. Had to go to the dealer to get it diagnosed. Seems to be not an uncommon problem. Apparently this same cam problem is not uncommon in German cars. Bad metalurgy??? A cam wearing out at 120000 miles is ridiculous.
Visitor, 2008 Volkswagen Jetta, 2.0L 4 Cylinder Turbo, 49,125 mi
Check engine light came on, dealer said it had camshaft problems. Haven't been given a cost to fix it yet.
Visitor, 2008 Volkswagen Jetta, 2.0L 4 Cylinder Turbo, 32,600 mi
First - check engine light came on - then RPMs started accelerating while in park.... then it started making a tea kettle whistling noise...still under warranty. they replaced the pressure regulating valve?... that fixed it.