Question about 2005 Volkswagen Jetta
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Posted on Jan 02, 2017
SOURCE: 1999 vw jetta 2.0
Sounds like two problems. P0300 and P0303 are possibly spark plugs. They could be a coil pack but I'm leaning toward a spark plug problem because of the other two codes - they're indicating O2 sensor problems. If the O2 sensors are screwed up, the car reverts to preprogrammed, rich fuel maps that send excessive fuel through the engine. The reasoning is, if the ECU can't trust the O2 sensors to determine how much fuel to burn optimally, it'll pump a bunch of extra fuel through the engine to keep it safe. Having too little fuel (aka running lean) can destroy an engine, so the ECU plays it safe and runs rich (too much fuel) instead. The consequences of rich running are relatively minor compared to lean running, but can and do tend to create excessive carbon buildup on the catalytic converter and O2 sensors, as well as fouling spark plugs.
First thing to do though is to swap the wires on your coil packs and see if you end up with a misfire code for the same cylinder #3. If you do, then it's the plug or wire. If it moves, it's the coilpack. Replace whichever part is faulty. You'll probably need oxygen sensors too, before you can clear all the codes.
Posted on Sep 02, 2008
Never ever bring a jetta to a volkwagen dealer. They will bend you over and rape you.
All you have to do is remove the top plug with a hex wrench.
Posted on Jan 12, 2009
Check for a switch at lower part of rad. Should see a wire harness & plug on a sensor at bottom of rad. This sensor/switch also operates fan on/off according to coolant temperature. You may need to disconnect battery to get at it safely.
Posted on Jan 16, 2009
one is located over the battery, the other is located in the side of the dash.
If you pop your hood the battery will be on your right sid in the front of the engine bay. There is a small rectangular piece on top of the battery with a lot of heavy guage red wires going to it. That is the engine bay fuse box.
if you open your driver side car door it's under neath a panel located inbetween the door and the dash board.
Posted on Jun 03, 2009
the front and rear pads are very easy to replace although you do need a piston wind back tool to replace the rears,my concern is if you are having to ask this question you probally should not be fitting the pads being a safety related item you cannot take risks.my best and honest advice would be to get a mechanic to replace them for you.Sorry if you dont think i,m being helpfull but you cant take chances with brakes.cheers
Posted on Aug 26, 2009
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