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Discussion Starter · #1 ·
The 2006 3.3 Grand Caravan. Started acting up bucking and some erratic shifting. and popped the CL light on. I checked the codes and they were both a P0344 and a P0443. they came on at the same time. So I decided to put in a new Cam sensor. Installed the sensor and before it went a half-mile it coded and started bucking again. Checked the codes, and had both the P0344 and P0443 again. And yes I cleared them before I tested it. Not sure what was going on, I had it towed to a mechanic I trust. They called and told me the timing chain was stretched which is what caused the problem. The van has a little over 200k on it, so I told them to go ahead and change the timing chain, at the same time they also replaced the crank sensor. so we have a new camshaft sensor, a new crank sensor, and a new timing chain set. Pickup the vehicle, it runs fine for a few days. just doing short around-town driving. We have to drive to a local lumber yard, and as we are almost there, it does it again, starts bucking, and at the same time the CEL light comes on again. We take it back to the mechanic, they are randomly driving it for the week. I call them up, and they say it did not mess up on them while driving. So we take it home, they have cleared the codes again, and no light. We drive it for about a week and a half and go to get on the freeway and it starts doing it again. I get it home and find the same codes a P0344 and the P0443 are both on again. Has anyone seen this and found the solution.
Thanks in advance.
 

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P0443 Evaporative Emission Control System Purge Control Valve Circuit
P0344 Camshaft Position Sensor "A" Circuit intermittent


The code damn near always includes the word "Circuit" and it's THE word people like to ignore the most when they're reading codes. Your problem is most likely going to be in one or more circuits. That means you need to find somebody who has good electrical and electronic diagnostic skills to diagnose the actual problem. I'm looking at OE wiring diagrams for your van and there are no common circuits between the cam sensor and the purge solenoid so I'd almost be willing to bet there's an intermittent short between a cam sensor wire and one of the purge solenoid wires.

I'm curious; how much money have you spent so far trying to get this problem fixed?
 

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Did you use mopar brand sensors or a store brand ? Use only
MOPAR on your mopar. Others can and will cause issues.
 

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Discussion Starter · #4 ·
P0443 Evaporative Emission Control System Purge Control Valve Circuit
P0344 Camshaft Position Sensor "A" Circuit intermittent


The code damn near always includes the word "Circuit" and it's THE word people like to ignore the most when they're reading codes. Your problem is most likely going to be in one or more circuits. That means you need to find somebody who has good electrical and electronic diagnostic skills to diagnose the actual problem. I'm looking at OE wiring diagrams for your van and there are no common circuits between the cam sensor and the purge solenoid so I'd almost be willing to bet there's an intermittent short between a cam sensor wire and one of the purge solenoid wires.

I'm curious; how much money have you spent so far trying to get this problem fixed?
The cost of replacing the timing chain, which I was good with because the engine does have over 200k. It was pricey, but not out of line for a shop to do it. I am no longer in a health position, to do the work myself. I have experienced an issue in the past on a Cavalier, with a harness that was too close to a heat source, and was reacting the same way. In working through the harness, I found where two wires had partially melted together, not a burn, nor was it through the shielding, but enough that when they got warm that they would crosstalk and it was very random when it would happen. I was able to peel them apart and move the harness a very small amount and never had the problem again. If the shop cannot find it, I will probably pull the alternator and start with the harness as it travels against the block, since that is carrying the wiring for both. That is why I posed the question, with the number of these built, I do not think I would be the first person to see this happen.
 

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Discussion Starter · #5 ·
There is the possibility of it being a flexplate gone bad, Evidently, the flexplate on the 3.3 and 3.8 can crack around the crankshaft. The Reluctor sit's around the flexplate, so if it allows the Reluctor to randomly shift back and forth in front of the crankshaft sensor, that will create some random issues. I am taking it over to an auto electric specialist.to verify.
 
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