2001 Mitsubishi Eclipse GT - P0403 error code

[Dave White]

My check engine light came on yesterday, and scanning the codes, I get a
"P0403 EGR Flow Circuit Malfunction". Last week I changed the air filter
and PCV valve - the light came on three days later, so I don't know if these
are related at all. Anybody know what I can check?

Thanks for any info,

Dave White

[Outlander]

If you used an aftermarket PCV I would be suspicious. In my limited
experience they tend to be leakers. I would soak the original one
(hopefully OEM) in some solvent blow it out with air and reinstall. Who
knows?

Dave White wrote:
> My check engine light came on yesterday, and scanning the codes, I get a
> "P0403 EGR Flow Circuit Malfunction". Last week I changed the air filter
> and PCV valve - the light came on three days later, so I don't know if these
> are related at all. Anybody know what I can check?
>
> Thanks for any info,
>
> Dave White

[Dave White]

"Outlander" <cdugan@mail.cosmosbbs.com> wrote in message
news:1119899357.292076.147730@f14g2000cwb......... o...........
> If you used an aftermarket PCV I would be suspicious. In my limited
> experience they tend to be leakers. I would soak the original one
> (hopefully OEM) in some solvent blow it out with air and reinstall. Who
> knows?
>

Ah, too late. I changed it Wednesday, and the trash came Thursday.

[Nobody U. Know]

The PCV valve isn't connected to the EGR in any way. It doesn't need
changing ever, really. It is a check ball inside a housing. Blow and suck on
it for the click sound and you know it's ok. If not, clean it out with brake
parts cleaner. That's all it takes. Its really a big scam at oil change
places.

Now, you changed that and the filter, well guess what? There are hoses off
the intake that feed into the EGR. Check that.
--
Todd Honea

"Dave White" <info@spectrachrom.com> wrote in message
news:HumdnZSYfJJh_SLfRVn-1A@...............
> My check engine light came on yesterday, and scanning the codes, I get a
> "P0403 EGR Flow Circuit Malfunction". Last week I changed the air filter
> and PCV valve - the light came on three days later, so I don't know if
these
> are related at all. Anybody know what I can check?
>
> Thanks for any info,
>
> Dave White
>
>

[Outlander]

If that Eclipse is mid 90's with the vacuum actuated EGR any vacuum
malfunction or leak will affect the EGR performance to some degree.

[Dave White]

"Dave White" <info@spectrachrom.com> wrote in message
news:guudne06haLNB1rfRVn-qA@...............
> "Outlander" <cdugan@mail.cosmosbbs.com> wrote in message
> news:1120181518.890897.301560@g43g2000cwa......... o...........
> > If that Eclipse is mid 90's with the vacuum actuated EGR any vacuum
> > malfunction or leak will affect the EGR performance to some degree.
> >
>
> No it's a 2001. I checked all the hoses - everything looks fine. I
cleared
> the code Thursday, but today the light came back (actually two readings of
> the same code), so it wasn't some random reading. I'm going to dig a bit
> further tomorrow.
>

OK, solved it. I replaced the replacement PCV valve (which was a cheapo
model from AutoZone), with another make. This time, when I installed it I
put a small metal hose clamp on the vacuum hose. The car's running much
better now, and I've had no more error codes. Whether it was a faulty
valve, or a bad hose seal, I don't know (I'm hedging towards the latter),
but as the car's running fine now, and it cost under ten bucks, I'm not
going to worry about it.