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You need an OBII scanner. Any good parts store can reset it for you but have them read the codes and if it comes back on you have an issue that's triggering it.
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probably a faulty O2 sensor. can be a DIY project, be sure to get
the right one. Bosch makes it for all Jetta models - be careful in
removing the wire. there is a reset button somewhere
under the hood to reset the computer, telling it you have replaced the
O2 sensor and validate the engine operation.
The most likely cause is loss of power assistance to the braking system which means you will need to apply increased brake pressure to compensate for the loss of assistance.
The problem will be with the brake servo assist. It is possible there is a leak in the brake servo assist system, which reduces the vacuum, so you are not getting sufficient mechanical assistance when applying the brakes.
It is unwise to be driving the car with this condition. If you lose all power assistance to the brakes, which could easily occur with this fault, the pedal will become very hard, you will need to apply very high pedal pressure and the vehicle will be very difficult to stop. You need to take the car to a VW dealer for service or to a competent brake specialist in your area to inspect the system and rectify the fault.
VW did a recall on some earlier year models for a leaking brake servo and I understand the problem was a faulty vacuum hose which would fail and leak. I am not aware of any recall for this item on later models like your 2004 vehicle.
Take off the battery cables. Touch the positive and negative together for 10 seconds. Reattach the positive first and then the negative. Your computer will be reset to factory settings. Idle will be better, cruise will work and air will be fine at the idle position.
audi a6 alternator stop charging battery,thought may be brushes,so replace them,constant charge 11.8,what could be the problem?coils looks ok,no plastic sighns,could be alternator voltage regulator?please help... WebRepOverall ratingThis site has no rating(not enough votes)
get the computer reseted ask at oreillys to let you see the code reader its usually free folloe directions on it see if these erases those codes make sure key is turned on dont start it.see if these help you
even tough is a 06 jetta i hope you dont have a bad 02 sensor see if reseting computer takes it off use code reader from oreyllys autoparts it should tell you what is wrong if there are no codes the computer just needed to be reseted that device should do the trick if that takes it off i hope it saves you money
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