Question about 2002 Volkswagen Passat
The check engine light is on but when I had it at a local repair shop, they said it was probably just the O2 sensor. Now it acts as though it doesn't want to go and the check engine light started flashing.
Take it to a part store and have them scan it for the codes they do it for free,and let me know thank you ted
Posted on Dec 11, 2012
I have a 2002 volkwagen jetta and my check engine light is blinking and my car jumps plus my engine is knocking
Posted on Dec 14, 2012
Have code scan first, a bad oxygen sensor will cause engine run poorly in rich mode.
Posted on Dec 11, 2012
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Posted on Jan 02, 2017
BTW - if you have less than 100,000miles you might be able to have your cat replaced under warranty by the dealer. In Canada it's 160,000km.
Posted on Mar 16, 2009
Well, it could be either and oxygen sensor or a knock sensor.
Oxygen sensor monitors O2 levels in the exhaust.
The knock sensor listens for engine pinging and adjusts the timing as needed.
Prices vary on repair. I would recommend having the owner of the car either show you something from a repair shop that has the sensor name written, or take the car to a parts store that offers free code scanning and see what comes up.
Posted on May 13, 2009
tell me everyrthing the car does.tell me what sensor light you referring to when you say car shudder.sound like transmission torque converter problems torque converter makes shudder noises.how does it shift does it shift hard or ****.it could be speed sensor it causes transmission problems.
Posted on May 20, 2009
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
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