P2308 error code

Codes translate as.....
P2302 = Ignition Coil "A" Secondary Circuit.
P2308 = Ignition Coil "C" Secondary Circuit.
You have a problem somewhere in the ignition system. 'Cool pack'? Did you mean coil pack?
It would be worth getting a good mechanic to test the fuel injectors as these can sometimes cause this problem.
Your only other option is to get a specialist to test the PCM (The Car's Brain).
P2308 OBD II Trouble Code Ignition Coil Secondary Circuit YourMechanic...

No cylinders fire at same time. 6 & 3 must be from same coil-ignition coil C-that is the one with the problem. And the secondary circuit- that is the spark firing portion of the coil. Coils have a primary winding circuit and a secondary wire winding circuit. The secondary comes out of coil as the tower, or the spark plug wire tower -the business end of the coil leading to the plug.

You could have a bad new coil (happens occasionally) or the connection to that coil may be the problem-the connection where the coil snaps onto the coil pack assembly. Try swapping that coil (coil C) with another one there and see if problem follows the coil. See? Keep your plug wires the same, just swap coils with another and see if the new position for suspect coil causes other cylinders to misfire. If a different coil in that "C" position causes same code, then it is not the coil itself, but probably the base assembly that the coil connects to.

These ignition systems use what is called a waste spark, or exhaust waste spark system. The coil will send spark to 6 & 3 simultaneously, but since one is always on the exhaust stroke while the other is on the compression (firing) stroke, the exhaust spark is very weak, and all the energy from coil is directed to the compression stroke cylinder. It sounds crazy but it works great.

Since you say it runs bad just as before, that indicates the coil is not the problem, but something wrong with the base of the coil pack . This is where the wiring is directed to the coils.

Get a Chilton repair manual this will have wiring diagram

This code could also mean the transistor inside the engine computer is fried . New PCM/ECM needed .

P2308 Dodge Description The current flow, or dwell, through the primary ignition coil is controlled by the Powertrain Control Module (PCM) by providing a switched ground path through the ignition coil driver to ground. When the ignition coil driver is switched on, current rapidly builds up to a maximum value, determined by the coil inductance and resistance. When the current is switched off, the magnetic field collapses which induces a secondary high voltage surge and the spark plug is fired. This high voltage surge creates a flyback voltage which the PCM uses as a feedback during the ignition diagnostics. The PCM continuously monitors the ignition system for concerns. The P2308 code sets when the PCM detects a short to voltage in the circuit.

Videos on youtube for testing Computer drivers . Chrysler Pacifica misfire codes p2308 p0303 Doesn't matter this a chrysler . Dodge , Chrysler and Jeep , samething

Pull the coil plugs when running. One at a time. If the engine gets worse the coil is good. No difference. Most likely the coil is bad. To check it again, swap it with another. Pull the plug on the suspected bad one. If it gets worse, look to wiring at the one that was no deference. Check for power to the plug.

check your coil current and spark plug gap.check your fuel pump or your coil connector wires

Error Code: P0303
Description:
Cylinder 3 - Misfire Detected
Possible Cause:
Wiring harness, igniter and fuel injector connectors.
Ignition system. (Spark plugs gaps)
Fuel injector No. 3.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression, cylinder No.3. (check valve clearance and throttle plate for excessive wear)
Engine control module (ECM).

Are you sure the wires are on the right plugs ?

P2308 Dodge Ignition Coil Secondary Circuit