Questions and Answers
Volkswagen Jetta Hesitation, Loss Of Power
Q. I have a 2001 Volkswagen Jetta TDI with 115,000 kilometers (71,457 miles). Recently I have experienced a hesitation when I accelerate as well as a loss of power. It seems to be getting worse.
I have gone to the Volkswagen Dealer but they tell me that I will cost a lot of money to determine what the problem might be. Do you have any suggestions to what the problem could be?
Mission, BC, Canada
A. Volkswagen has issued a TSb on this problem. According to this TSB, the cause can range from a bad ECM ground to a clogged snow screen in the air filter housing to a bad or clogged EGR valve or passages. This is a list of all the possibilities from that TSB.
- (Engine Control Module) ECM ground connection.
- Injection pump timing.
- Snow screen (if applicable) at intake air duct.
- Vacuum hoses.
- EGR valve and intake manifold air flap (integrated in EGR valve).
- MAF sensor and EGR valve including solenoid valve.
- Crankcase ventilation system.
- Engine oil level.
- Fuel quality.
You can ask your Dealer for a copy of the TSB. It is:
Dated: Apr. 2, 2003
Poor Throttle Response
Golf, Jetta, Jetta Wagon, New Beetle 1998 to 2003 with 1.9L TDI (Engine code ALH)
Poor throttle response on 1.9 liter TDI equipped vehicle.