Hello I recently got this code and while trying to diagnose it I came across a few issues. First I noticed that while running the test for block 034 the aging value was around .755. I was reading that it should at least be .80+. Also while trying to run the test on block 046 I could not get it to initiate. There were a few times when it would say Test On then after about a second it would say Test Off. I am just wondering if the pre-cat O2 sensor is good and how to get the block 046 test to run correctly.
I have been reading around and from what I have gather it is most likely the Cat. I have been hearing the exhaust rattle at low rpms for a while. While getting some of my exhaust done I had checked for rattles and did not find any. I heard this could be the inside of the Cat going bad?
Thanks for the link. That’s basically where my search began. I have searched Google and vwvortex to find out how to do the tests just cannot seem to find out why I cannot do the block 046 test. I performed block 034 test, then got the cat above 400C, in basic settings mode, pressed and held brake, pressed and held accelerator to WOT. It just seems to not want to initiate the block 046 test and I cannot figure out why. I really would like to narrow down the issue to a special sensor or if it is in fact the cat, instead of throwing money and it and hoping I bought the right part.
I am going to get under the car tomorrow and check for any possible leaks as well as check the intake for leaks just to cover the basics.
If this is the 2003 1.8T the 046 test should run after all of the other self tests have passed. Meaning, 034 followed by 046 may not test on and complete successfully.
You should have a readiness script in our current release if you're using a Ross-Tech intelligent interface. Post the actual scan data from this car. If its stock (not tuned) you may have an update programming available at the VW dealer that might resolve Catalyst Inefficiency faults.
So the I get the firmware update at the Dealer I take it? I replaced the n80 in September and passed smog in October. My readings for smog were about average which is why I am hesitant to replace the cat. But.. it is probably the better place to start because if it is clogged it wouldn't be to good to continue driving with it. I ran the tests on the MAF and it was within spec, also cleaned it a month ago. The EVAP leak it something I am going to work on next weekend.
Cody, did you ever figure this out? I read your other post with 17705 , 17544 , 16891. LOL it was in top 10 on google but no answer.
I have the same car, 2003 jetta 1.8t and I've done everything you've done, including the FULL 034 kit + billet valve and am having the same issues. No CEL before any of the repairs even tho breather hose was literally VTA - venting to atmosphere.