Question about 2001 Volkswagen Passat
We located the sensor, but isn't coming loose even after using JB Blast on it. Any ideas or tricks?
If it is on the manifold, as many sensor 1's are, then the trick is to keep applying the PB Blaster, and then after 4-5 applications, run the car to get the manifold hot. While it is hot, use an exact-fit impact socket and either an impact wrench (preferred) or breaker bar if I.W. won't fit.
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Posted on Jan 02, 2017
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.
Posted on Jul 23, 2009
you may have to go under car but if yuou can get the air box and hoses off without breaking the vacuum t for the smalle hose you can reach around the motor and get it ou that way it is in the exhaust manifold
Posted on Jul 30, 2009
Yes you have a problem with wiring for the O2 sensor shorting out somewhere in the line. It could be anywhere from the sensor to the ECU. Make sure there are no breaks, burns, or crushed parts of the wiring.
Posted on Feb 02, 2010
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.
Posted on Feb 24, 2010
this is the O2 sensor that is just off the engine in the exhaust and before the catalytic converter, sensor one bank one, u only have one bank of cylinder
Posted on Apr 28, 2010
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