So I have to register my car in WA since i bought in cali, I failed emission yesterday due to p0410. I followed the fix on the forum by soldering which worked, however the test failed today due to not ready . The guy said that the computer\memory had to be rebooted after the fix. Any of you guys can help with this ?

 

Reset procedure is 1 hour battery disconnected I think.

 

I'm thinking it's only a couple minutes that will clear the cel.. but then I've read about 60 miles of driving to clear it out of the computer..

 

Cycles. Driving cycles is the answer!
Start it again, drive a mile or so, shut it off. Repeat a few times. It will clear.


Or go get ya an Ultragauge ($80) and you can reset it at will.

 

He mentioned a drive cycle so I think that may be it but I'm not sure how long though

 

It is described in the service manual (you can download it from this forum). See page 25-39.

This could take several cycles to clear, and I was wrong, "cycle" is defined differently depending on what set the light.

Drive the car a few days, it will clear.

 

That is, chapter 25, page 39. Not pages 25 to 39.

 

yep, I just called chrysler and they said there is no way to force it other than to drive it. I asked how long and he said that he always advices a full tank of gas as a general rule

 

I guess the guy at Chrysler never heard of an Ultragauge. (Or he just wanted to get you off the phone.)

I can unplug my EGR valve which will set a P0401 in several miles. Then plug it back in and use the Ultragauge to turn the light off and reset the P0401.

I do it when I go to the Dragon or drive the curves on Blood mountain. (I have a switch on the console to unplug the EGR valve.)

Go order an Ultragauge for $80, you will not only have fun learning about the car, but you will also have a powerful diagnostic tool and you will have 53 gauges (most of which you don't have now) that tell you all sorts of stuff the PTCM is watching. You can read the codes (in fact, they pop up automatically) and reset them and the light when you get the problem fixed. Or when you THINK it is fixed, you can reset the code and turn the light off, if the problem is still there, it will come back.

 

Curious : why do you unplug the EGR ?
It can't make THAT much difference, can it ?

 

Why use heavier oil that will find it harder to lubricate in thinner gaps, why change the fan temperature and why have an oil gauge.
I thought an UltraGauge would be good enough for checking if you had enough oil.

 

When mind failed, it stuck closed - that is, 'off'. It SEEMED like the car was peppy-er. But I dismissed it. I backed away from trying to replace it myself and took it to an MB shop that treats me very well.

Anyway, the guy remarked, "The car's been a bit quicker on the uptake, hasn't it?" I told him I THOUGHT it did, but thought I'd imagined it. He then explained what the valve did and why it was there.

THere is no more power, because, when you get on the accelerator hard, the PTCM closes the valve anyway. But there is a delay before it closes.

THe valve being open allows exhaust into the intake, while this reduces NOx, but it also reduces performance.

Go tear around where you have curves, etc. that mean you are on and then off the pedal a lot.
Disconnect the valve.
Try it again and see what you notice.

I find turning the EGR off has as much effect on response as a throttle reset.


Just try it yourself.

 

The Ultragauge doesn't tell you ANYTHING about oil level or pressure, Dave.

 

Now I understand being able to clear the light.. but Didn't Frank play round and round trying to get his system to pass after clearing the cel? Ultraguage wipes out all logging of the error too?

 

I don't know. I did ask the emissions guy (because I had to get the EGR changed so it would pass emissions) and all he said was, "If the light isn't on, I can run your check". But I'm not sure I made the point about how I had turned the light off with the Ultragauge.

Of course, I got delayed a week before I went, by that time, the car had been thru enough cycles that it would have been cleared anyway. SO I just don't know.