Volkswagen: jetta converters, oxygen sensors, oxygen sensor

Question
I'm having a problem with the check engine light, apparently tied to a catalytic converter problem, but the converter was replaced two years ago.  Is it possible it needs a replacement already?  Or could there be a sensor problem somewhere?

Thanks,

Mary

Answer
Hi Mary,

No worries, this doesn't sound like an expensive problem.  I will make the assumption that your car has been tuned up fairly recently. (plugs, filters, etc.)

If you had your Cat. converter replaced 2 years ago, I don't think there is anything wrong there.

95% of the time, the problem with the 'check engine' light on in your Jetta lies in two areas:

1) Fuel system: Make sure that your fuel cap is on tight.  Remove it, and than tighten it back down.  Check to make sure the rubber seal is ok.   This will trip the "check engine" light if not correctly sealed.

2) Your Jetta may require an oxygen sensor, which can trip the "check engine" light as well.  

I'm not sure what year your car is,  but oxygen sensors usually run around $50-60.

Either way, it sounds like a fairly simple fix.  I hope this helps you out Mary, and please let me know how you make out!

Ron