I have a 2.7L 2002 Dogde Intrepid with approx. 120K miles on it. I had an error code of p0344 and p0340 appear. We replaced camshaft sensor. Went to drive the car home and it began jerking. Continued to jerkuntil it finally decided to shut off completely while driving down the road. Realized the calaytic converter was partly to blame. Left the car to cool over night and started right up allowing me to make it home. My father is a transmission mechanic and took a look at it with the OBD reader. The codes still appear, the catalytic converter is running at extreme heats, and the computer in the car isn't the original. We replaced both the camshaft and crankshaft sensors, new catalytic converter,checked all wires for shorts, and placed a new computer in the car. Codes still appear even after being reset. Car is drivable if kept under 2400 rpms. If the rpms exceed this amount the cars begins to jerk again and wants to quit. Any suggests of what is going on? I called the local dealership and they basically said they would need $75 up front to even touch the car, and basically repeat all the steps we have already done so far. I have spent well over $1000 already. Please help!!!!
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P0340 is no cam signalat the PCM. I don't know what the P0344 is. The camshaft position sensor information, along with the crankshaft position sensor information, is used control the fuel injection synchronization. The excess heat from the catalytic converter indicatesunburned fuel going out the exhaust. The catalytic converteris designed to burn any fuelleft in the exhaust. It sounds like your injectors are definitely out of sync dumping raw fuel out the exhaust. Since youreplaced the both the sensors and the PCM, it sounds like a wiring problem betweenone of the sensors and the PCM. Always use a digital multi-meter so you don't blow the PCM. Pull the cam sensor connector and check, with the key on, for about 8VDC on the orange wire (power from the PCM), and put the negative lead on the black/light blue wire (ground.) If you get about 8 volts both of those 2 wires are good. That just leaves thetan/yellow wire (sensor signal.) The signal should fluctuate 0 to 5 volts as the cam notches pass the sensor. To check the wire you would have to probe this wire at the PCM with all the connections put together, key on, and engine rotating (either by hand or with the starter.) The crank sensor wiring could be checked basically the same way. Overheating the cayalytic converter can cause the ceramic beads inside of it to crack, requiring replacement. Don't overheat the converters if you can help it. Turning the key on with a sensor unplugged will usually set an OBD code that will need to be cleared. It sounds like your on the right track. Let us know how it goes.
Or rather the reluctor on the cam, if it has slipped (I honestly don't know if they're pressed on or machined in.). Or there could be a CMP wiring/connection problem. No P0171-174 codes to indicate rich or lean, though? Should throw one or more of those, if the cat is running that hot.
I also have a 2003 Dodge Intrepid with a 2.7 engine. With the same error code Po340. I have replaced the crankshaft sensor and camshaft sensor still problem exists. I have 43,000 miles on it. For some reason after I have driven the car for and hour or two. The engine light goes away and the car runs great no hestitation whats so ever. Of course I would have to turn it off and then back on. And this is everyday. Any help would be most greatful. Thanks
IIIII NEEEDDD HELP.......
I have intrepid 2002 , I change new motor 1999 after I fixed I have 2 codes P0340 and P0344 after a put in my car the fearweel 2002 now I have just P0344 and I have many problem to make here start and if he start the car is drivable if kept under 2400 rpms. I need to tell me if I keep some pieces of the original motor (2002) in the new motor(1999) to resold this problem P0344 .