Hello! The bulb failure indicator on board of my VW Golf VI is lit, even though all the lights are fine (I checked many times). This happens totally randomly. Sometimes the indicator is lit, sometimes is not. The board computer is recording an error (all lights are burned) when the indicator is lit. The VW workshop could not help me unless I am paying some 2 days of working for checking all cables, they said, and they could not guarantee that will find the problem. I find this stupid, because if a cable would have a problem, then the light would be really off. Could anybody please help with an idea? Could be that the sensor itself is damaged? Is it difficult to change it? Thank you very much!
In the past i have found that the module that senses the resistance change when the bulb burns out and triggers the light out warning is defective, it cost about $300 to replace so I have only replaced maybe 2 of the modules. Do you want to spend that much or just ignore it or better yet disconnect it.
SOURCE: 1997 4.0 6cyl loses power intermittently Bad Coolant Sensor Light (replaced)
Replaced both CO2 Sensors.
SOURCE: Mirror indicator
under the mirror there should be a 1 1/2 slot door under mirror that looks like a flat lid this will be flush with mirror moulding where it looks like a quarter can turn it
this is the light access panel the detachment screw is threw this panel to take off mirror then you can access the bulb
SOURCE: Left rear brake light stopped working but bulb and fuses are OK.
take the bulb back out have someone sit in car apply brake get your self a circuit tester and check to see if this circuit is carrying efficient 12 volt current! some times in cold weather these bulbs get hot with long period of breaking and when released condensate and rust begins and you get what you have perhaps bad socket! this would be a ideal location to begin and probably end,
SOURCE: 2003 VW Golf - O2 Sensor?
Honestly it is not very expensive to replace, but it is not extremely important. What it does is measure the oxygen/fuel level coming out of the engine. This tells the computer that the engine is either using the right air/fuel mixture or allows the computer to change the mixture slightly to allow the car to run properly. You could pull the sensor out and clean the terminal as it usually has alot of carbon build up due to its location, but this is normally a temporary fix. I hope this helps you with your problem.
SOURCE: have this code PO171, what does this mean.
Not sure that the O2 sensor was bad. It sounds like it was telling you that side of the exhaust system was picking up a lean mixure at the O2 sensor. The O2 sensor was doing its job by telling you the mixture changed. If the O2 sensor was bad, it would say low voltage range for that sensor, or open curcuit.
Now the car has had time to do its diagnostic sweep, it is telling you the same thing, but from a different sensor...the fuel mix is too lean. Air/spark/and fuel is what you need in the correct amounts. In your car, the ECM engine control module controls this by taking readings from all the sensors several hundred times a second.
Mechanically, you have a few options. Change the fuel filter...under the car on the passenger side. It is an easy job.
Change the fuel pressure regulator. This keeps the fuel at 4 BAR so the fuel injectors can do their job correctly. This job just needs a screw driver to pop off the clip that holds it in place. No hoses need to be removed. It is on top of the intake manifold, in-line with a metal fuel line and a rubber one.
The fuel injectors could be clogged up on one side of the engine. Run some fuel injector cleaner through a tank of gas. Also, listen for a constant ticking sound at each injector. If one sounds off PAR, then replace it.
The fuel pump may not be giving you enough power. However, the readings seem to be localized to one side, so I doubt it.
Start with the easiest thing, and see if it works. Also, you will need to get yourself a VAG scan tool. It is the only one with codes in it for all of your VW systems, not just engine codes like the ODB scanners. You can get a nice one for $50 on-line.
Good Luck!
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