A problem with the torque converter can cause the Check Engine Light to illuminate.
Resources for the Repair and Maintenance of your 1998 Volkswagen Passat TDI
1998 Volkswagen Passat TDI
1998 Volkswagen Passat TDI Problems
The anti-lock brake system (ABS) control module may fail causing the ABS light to illuminate. Failed modules should be replaced to restore ABS operation.
Our technicians recommend having the constant velocity (CV) boots and CV joints inspected at each service. Servicing torn CV boots early can prevent the need to replace the CV half shaft or CV joint.
Erratic turn signal operation can be a result of a failing turn signal flasher relay which will require replacement.
The water pump may fail resulting in engine overheating and possible timing belt damage. Overheating and/or timing belt failure can result in very expensive engine repairs. As a precaution, it is recommended to inspect the timing belt and water pump at regular intervals.