Top 10 1999 Volkswagen Jetta Questions & Answers

I also have a 99 Jetta and I ran into this problem once or twice. How long do you wait in your car after closing the door before trying to turn it on? I've found that the car sometimes will automatically lock itself and engage the alarm system if you are inside of it for over 30 seconds without making an attempt to start it. When this happened to me, I would hit the unlock button on my keyfab twice and then attempt to start the car. Lemme know if this works for you!

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.

The fuse box in located on the left side of the dash, between the door and the dash.

you may need to put a relay in it as the current from the horn may be back feeding up the immobiliser horn circuit and causing a short. Sounds like the immobiiliser has its own source of power seperate from the factory circuit When you press the horn the power goes to the horn and up the immobiliser horn circuit and it blows the fuse.

Hi, sounds like it's in limp mode. This can happen even when you just change the transmission oil, let alone for other problems.

Firstly, I would disconnect the battery overnight if you can. Reconnect it and drive. If you're lucky, the TCM will reset and clear the memory of errors it's picked up.

If problem persists, and you are not having any warning lights come on, then it may be something such as the input speed sensor, or the shift solenoid pack. These can get gummed up and sometimes varnished if old oil. put in something like seafoam transtune and let it remain in your tranny for a week or so. If the car is still stuck in 3rd, run the engine and keep shifting through the gears for about 15 minutes, this will work the solenoid.
If it is the solenoid, what you will notice is when the engine is reset, and you put it in srive, there's no jolt or jump. When the car is in limp mode, it will give you a slight jump into gear like it is seeking to lurch forward.

If you are lucky, then this may ease off over a week. The other thing is, when did you last change the transmission oil?

Before you start changing parts on the car, after disconnecting and reconnecting the battery, take the car to a parts supplier like o'reillys and ask to use their engine fault diagnostic tool. This will give you the codes of faults which you can look up.

If you end up finding some faults with the ECM, TCM, etc, shop around for module suppliers as the factory ones are very expensive.

Lastly, if its mechanical, then you'll have no option but to take it into a trusted transmission repair shop who'll be able to run a road test.

good luck.

http://forums.tdiclub.com/showthread.php?p=844411 this how to should work even if your car is the older style 99 they have the same layout for all 4cyl engines

Here ya go!

Your car uses what is called a hydraulic clutch, the master or the slave hydraulic cylinder is leaking fluid and you have no pressure in the system, this causes the clutch to go to the floor.

Sorry for the severe delay.
I am personally going back to answer your unanswered question.
I do not know if you still need the answer, but I am going to answer it in case you still do.

Click on the following direct Link. It has the Timing Belt Diagrams with Marks for the Camshaft and Crankshaft that you will need. It also has schematics on cover bolt locations; tools, and procedures.

Again my apologies...
Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

http://www.2carpros.com/car_repair_information/year/1999/make/volkswagen/model/jetta/1999_volkswagen_jetta_timing_belt_diagram_marks.htm

Hi there,

If you have correctly retrieved this code, then this relates to your transmission:

Code P0768 = Shift Solenoid D Electrical

Shift solenoids are responsible for the shifting behaviour of your transmission. This code has been triggered due to an 'out of spec' condition of this particular solenoid.

These solenoids can usually be "tapped into" (operated/tested remotely) using the manufacturer's factory scan tool, without removing or dismantling of the transmission.

I recommend you have this solenoid inspected and if definately out of spec, then the transmission fluid should be drained, trans sump cover removed and the Solenoid D 'resistance' measured.

The solenoids can usually be replaced when the sump is removed (transmission still in vehicle).

Hope this helps....

Cheers,