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Town and Country Rough Running, P2308 code, Coil? Wires? Plugs?


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djs789
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Jul 20, 2010, 11:17 AM

Post #1 of 5 (1159 views)
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Town and Country Rough Running, P2308 code, Coil? Wires? Plugs? Sign In

I have a 2006 Chrysler Town and Country 3.3l. The check engine light is on and I am getting P2308 error code. The Parts store print out says this is an erratic signal from the ignition coil secondary circuit.
The probable causes are:
1.Faulty spark plug or coil boot or 2.Failed ignition coil.
The van is running rough, Has a rough idle, Hesitation, Sputtering, Excessive engine vibration.
I replaced the spark plug wires a month ago. I replaced the coil and the spark plugs today.
The van is still running rough any suggestions?


Sidom
Veteran / Moderator
Sidom profile image

Jul 20, 2010, 11:15 PM

Post #2 of 5 (1147 views)
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Re: Town and Country Rough Running, P2308 code, Coil? Wires? Plugs? [In reply to] Sign In

There are a few more other things that can cause this problem then what you have listed. That code is for the coil circuit for #3 cyl. You should've had a P0303 as well...strange...

Since you've changed the plugs with no change, what you can do is clear the codes and switch the #3 wire to a different cyl. If you get a code for the cyl you moved the wire to then you have a bad wire...

After that it gets a lot more indepth and you will need a scanner and some other equipment to check out the circuit out to see where the problem lies..........






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djs789
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Jul 21, 2010, 1:18 PM

Post #3 of 5 (1134 views)
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Re: Town and Country Rough Running, P2308 code, Coil? Wires? Plugs? [In reply to] Sign In

Update:
I checked for arcing at night. No arcing. I rechecked and set gaps on the new plugs I put in.

The p2308 code is an error in the ignition coil #3. Coil #3 fires cylinders 2 and 5.
Erased the code. Then I flopped sprk plug wires from another cylinder for the number 2 wire.
I get the same p2308 code come. I did the same with the 5 cylinder wire with the same results.
So I am pretty sure its not the wires, plugs, and coil (which is new).

I checked with a TEST LIGHT the control wires for all three of the coils with the engine running.
Pin #1 (brown/orange wire) control wire for coil #3 LIGHT GLOWS CONSTANT. I think this is wrong.
Pin #4 (dark blue/tan wire) control wire for coil #2 LIGHT FLASHES - I think this is normal.
Pin #3 (dark blue/dark green wire) control wire for coil #1 LIGHT FLASHES - I think this is normal.

Since the control wire glows the wire must not be bad or grounded. I think the pcm must be bad.
Probably a good bet the computer is bad and should be replaced?

I don't know. Is there anything else I should check? The pcm is expensive. What do you think?

Any suggestions on replaing the computer if you think I should?


Hemi Guy
User

Jul 21, 2010, 5:25 PM

Post #4 of 5 (1125 views)
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Re: Town and Country Rough Running, P2308 code, Coil? Wires? Plugs? [In reply to] Sign In

First make sure the ignition wire boots are dry and free of al moisture. If that doesn’t do it
Chrysler has a pcm update (re-flash) for p2308. (TSB number 18-008-05).



djs789
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Jul 28, 2010, 10:54 AM

Post #5 of 5 (1098 views)
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Re: Town and Country Rough Running, P2308 code, Coil? Wires? Plugs? [In reply to] Sign In

Update:
I traced a bad coil driver signal going into the coil all the way back to back to the pcm for coil#3. I determined the pcm had a bad coil driver for the #3 coil. I ordered the remanned computer from Auto Computer Exchange in FL.
I installed the new computer. It seems to work. The computer has a lifetime warranty so I think I am golden. Thanks for your help.




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