Re: Can read ODB, but failed emission because of ODBOn May 24, 10:22 pm, "Steve W." <csr684...@yahoo,com > wrote:
> vdu wrote:
> > This is a Chrysler Town and Country 2008, 3.8L, 103 thousand miles. I
> > just replace the engine 5 months ago.
>
> > I am able to use an ODB scanner to read the code and it says 7
> > emission tests are ready or something to that extend.
> > When I bring it to a inspection station, they say they can't read the
> > emission from the ODB interface. I said I just did it before driving
> > there. They said this is not a scanner, but it's an emission
> > computer. The guy also said maybe the cigarette plugs fail and he
> > uses a light tool to test it. It wasn't on when the car is running.
> > I take it home, use a volt meter and measure it. It's 14VDC. Which
> > is a bit high. Is it unusual for this voltage? Apparently he didn't
> > test the cigarette plugs correctly.
> > What should I do? Bring it to a dealer? Could some car shop be able
> > to diagnose and fix this type of problem? I don't have a good
> > experience with this dealer, and the next Chrysler dealer is 45
> > minutes away.
>
> > Please help.
>
> What you read on the code scanner and what they need to test for are
> entirely different things. They only plug into the OBD port to make sure
> that the computer is working and that you didn't just clear a code and
> bring it in. They then use a probe to measure the exhaust gases and
> determine if it passes.
> Now if your in an area like I am in upstate NY they only do a low
> enhanced test. Basically they plug into the OBD port and make sure that
> all the tests were run, if they have and they passed then they do a
> safety inspection and if you pass that they put on a sticker. No exhaust
> measuring.
>
> Basically you need to know why it failed.
>
> --
> Steve W.
You're right. I brought it to a mechanic and spoke to an inspector.
He said that the two read the same information, however, the hand
operated scanner supplies its own power, while the inspection
station's machine does not. So there is a lack of power for my data
link connector. Is anyone familiar with this model know where I
should look at?