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2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up

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4 years 11 months ago #28850 by Mechanic 350
2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up was created by Mechanic 350
so Monde, here are the following readings of the wires: KOEO

1. signal wire

plugged = 3.98v
unplugged= 4.94v

2. 5V ref wire
0.01
plugged= 4.98v
unplugged= 4.98v


3. sensor ground

plugged= 0.01

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4 years 11 months ago - 4 years 11 months ago #28851 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
so Monde, here are the following readings of the wires: KOEO

1. signal wire

plugged = 3.98v
unplugged= 4.94v

2. 5V ref wire

plugged= 4.98v
unplugged= 4.98v


3. sensor ground

plugged= 0.01v
unplugged= 0.01v


4. chassis ground

plugged= 0.00v
unplugged= 0.00v

6. egr control

plugged= 0.00v
unplugged= 0.00v

Can you help me decipher these numbers?
I haven't check ohms yet on the signal wire from solenoid to computer.
thanks
Last edit: 4 years 11 months ago by Mechanic 350.

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4 years 11 months ago #28854 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
EGR Control Continuity test= good

PCM unplugged:

at 200 ohms= 00.9 ohms

at 2K= .001 ohms

I'm giving you these readings as I'm doing them now.

thanks

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4 years 11 months ago - 4 years 11 months ago #28855 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
no sir, engine not running. I'm running these tests with the pcm disconnected.
Last edit: 4 years 11 months ago by Mechanic 350.

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4 years 11 months ago #28856 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
I'll run the test now engine running. give me a minute, I have to put pcm and everything back.

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4 years 11 months ago #28857 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
By the way, short to ground test, checks out ok at OL

meter lead to egr control wire, other lead to battery ground.

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4 years 11 months ago #28858 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
Any other tests you suggest before I put everything back? thanks

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4 years 11 months ago #28864 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
ok everything is put back.

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4 years 11 months ago #28872 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
I haven’t yet. I’m burned out. I’ve been on this car all day. I’ll pick it tomorrow after church. I don’t want to keep you waiting. Thanks for everything. I’ll speak to you tomorrow buddy. Thanks again.
The following user(s) said Thank You: Monde

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4 years 11 months ago #28890 by Tyler
Replied by Tyler on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
Still following along when I can. :)

1. signal wire

plugged = 3.98v
unplugged= 4.94v


This value stuck out to me. Does it change with the engine running? I ask because I was recently working on an '06 Caravan 3.8L for various issues, and happened to have a new EGR valve from another shop. The closed valve position voltage was closer to 4.2V.



I don't think that accounts for your code, but it might point towards a faulty potentiometer in the valve.
Attachments:

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4 years 11 months ago - 4 years 11 months ago #28894 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
The problem is Tyler, that this is the 3rd egr I have replaced
Last edit: 4 years 11 months ago by Mechanic 350.

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4 years 11 months ago #28895 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
No Tyler the engine was not running

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4 years 11 months ago #28897 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
This link doesn’t open up Monde. It’s says 404 not found

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4 years 11 months ago #28898 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
Tyler by the way, what’s the procedure for me to test all power and grounds if I ever have to condemn the pcm? Chapter 2 and 3 does not show this. Thanks

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4 years 11 months ago #28899 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
All the egr purchased thru rockauto.com

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4 years 11 months ago #28900 by Tyler
Replied by Tyler on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up

MOROSO321 wrote: No Tyler the engine was not running


Yep, I recall that from one of your earlier threads. Were any of them OEM? Or from the dealer? Because aftermarket EGR valves, especially linear EGR valves like your design, are trash garbage.

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4 years 11 months ago #28901 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
No, unfortunately, all the valves have been aftermarket.

None from the dealers
All of them non- oem

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4 years 11 months ago #28902 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
As soon as my wife gets home from church I’ll be able to perform that ohms test that monde told me to do between the 5v ref and the signal wire.

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4 years 11 months ago #28904 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
Yes sir

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4 years 11 months ago #28908 by Mechanic 350
Replied by Mechanic 350 on topic 2005 Chrysler Town & Country 3.8 P0406 EGR sensor high- follow up
Connector plugged or unplugged?

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