2006 jetta 2.5 engine light on

check fuel pressure

Try a Auto Zone in your area,They will run the code for you and give you a printout that will tell you exacty what it is,,,,and its free, This way you can be sure,Dealerships like keeping you guessing so they make money off every wrong guess,Ouch! for your wallet.Your jetta is old enough for the cam sensor to be bad,not a hard fix,,,but if the sensor has scraches on it from the cam rubbing on it that means your cam it hiting it,,but than again You might have over head cams,and than its just a malfuctuing cam sensor and its again a easy fix ,,,,first find out what it is than locate it and than remove and replace.

02 sensor is 300 try scrap yard 40pound 02 sensor is on front of exhaust 3 wire sensor

CHECK ENGINE OIL LEVEL SOUND LIKE LOW OIL LEVEL.CHANGE OIL IF IT HAS BEEN OVER 3000 MILES OR OIL LOOKS DIRTY CHANGE IT.IF OIL CHANGE DONT HELP HAVE OIL PRESSURE CHECK TO SEE IF OIL PUMP GOING BAD OR YOU HAVE A FAULTY OIL PRESSURE GAUGE.

Changed the timing belt and knocked loose the wires or connections to the sensors on the mass airflow device.

99% of the time we mechanics tend to trust computer of what it tells us when it come to engine diagnostic; i hate to not agree with VW mech which he pull the code and state is knock sensor although I have ran into computer spit out many wrong code and still does not fix the problem however I go ahead and replace it any way. Now if that does not fix the issue after replacing with new parts, I then would go back and plug computer back in to see what other code it would spit out. my opinion, I would also have your air-mass flow sensor check, some people don't realized throttle control/airmass flow sensor also link into the ECU compute between the revolution sensor of the transmission telling computer is time to shift. faulty air-mass sensor can also cause it to bogs or not picking up speed giving a false sense the transmission is not working correctly. you can go to auto zone and use their computer for free if you need to re-pull the code after replacing the knock sensor.

if there is a knocking sound the computer will start retarding the timing to get rid of engine knock thru the knock sensor. Make sure you are using the correct grade of fuel. it will be listed in your owners manual. the improper grade of fuel can cause detonation in your engine. giving a knocking sound. if the change in fuel doesn't help you may be looking at mechanical repairs. hope this helps. mike

Volks 2001 Jetta 1.8T
Engine light on and fails to start.
Codes P0341, P0328, P0171, P01297 what are this codes telling me??? HELLLPP!!!!

I had the same problem with my wife's 2006 passat turbo. We lost 2.5 quarts in 3000 miles and the warning light came on. They put us on a 1000 mile oil test and I lost 1.8 more quarts of oil. They finally agreed to replace the rings. Service tech told me that the factory rings are defective, they begin to lead after about 25,000.

I'm no expert but it sounds as if you might have some moisture (water) contaminating your tranny fluid. I'd first try having it drained, flushed and refilled with fresh fluid. Preferably after it has been warmed to room temperature - -2 brrr.