Mechanics

CHRYSLER TOWN AND COUNTRY SENSOR PROBLEM

1996 Chrysler Town and Country • 24,500 miles

Its a 3.8, is there a coil sensor, if so where is it located, code po340
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Guest
December 9, 2012.




P0340 Camshaft Position Sensor Circuit Malfunction

Follow the upper radiator hose to the thermostat housing on the passenger side of the engine. The cam sensor is in between that housing and the engine mounting bracket. It will have three wires.

Caradiodoc
Dec 9, 2012.
I put new, coil, cam sensor& crank sensor, still the same

Tiny
Jaykaro
Dec 11, 2012.
Start& run but misses, 2 top post of coil, no fire

Tiny
Jaykaro
Dec 11, 2012.
Did you use a paper spacer with the new crank sensor, or did it have a thin plastic rib molded to the end?

What does "no fire" mean? If the engine runs, there has to be voltage to the ignition coil, and the cam and crank sensors have to be working. Those sensors won't cause a misfire.

Caradiodoc
Dec 11, 2012.
It had a thing on the end of sensor
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Tiny
Jaykaro
Dec 11, 2012.
There is no fire coming of the 2 top post on coil, pull plug wirs off, nothing, pull the other 4 wires off you get a jolt

Tiny
Jaykaro
Dec 11, 2012.
Normally no spark from just one coil is due to the coil assembly itself but since you already tried a new one, I'd suspect a broken wire between it and the Engine Computer. That should be detected by the computer and it should set a related fault code. Since it hasn't done that, you might suspect a problem inside the computer itself. It's more likely you'll find a corroded terminal in a connector, or a stretched terminal. The best way to find those is to unplug the connector right at the computer and make resistance measurements for all three circuits. If they all read about the same, suspect the computer. Be careful when sticking meter probes into the terminals because that's the most common way they get spread, then they don't make good contact with their mating terminals.

You can also use a scanner to command the computer to fire each coil without cranking the engine. If all of them fire when requested, that proves the computer, its control circuitry, and the coils are working. The top suspect then would be a cracked flex plate. Usually they won't just spin freely; they can shift position just enough that the crankshaft position sensor doesn't read some of the notches in it that tell the computer which coil to fire and when.

Caradiodoc
Dec 12, 2012.

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