03 Diesil 2500 losing power

[Toolman528]

I hve an 03 24 valve diesel that starts rough and will hardly move at first when cold. runs better when warm but still hard to go uphill. I got two codes from the engine light. P0341 and P0628:confused:

[Tbird100636]

I hve an 03 24 valve diesel that starts rough and will hardly move at first when cold. runs better when warm but still hard to go uphill. I got two codes from the engine light. P0341 and P0628:confused:
P0341- Camshaft Position Sensor Signal- There is a TSB for this code, an ECM flash, TSB 18-003-04.
P0628- Low Voltage detected at Fuel Lift Pump- Does the lift/transfer pump operate when turning the ignition key to the on position??? Is it still a block mounted transfer pump or has it been retrofitted to the tank mounted unit??? If still a block mounted one, here's what you do. With the engine running wiggle the transfer pump connector. Does the engine start running rougher??? If it does there is an issue with the harness connector pins.

https://w05.dealerconnect.chrysler.com/service/mds2002/serviceInfo/en_US/815ef474.gif
No difference next check the transfer pump supply circuit's resistance by disconnecting the ECM and the Transfer pump. Measure the resistance of the Black/Orange wire between the ECM connector and the transfer pump. Less than 1 ohm resistance is good. More than 1 ohm indicates a fault in that wire. If the supply checked good, measure the resistance of the transfer pump ground Black/White wire. Measure from the transfer pump connector to the negative battery terminal. Less than 1 ohm is good. More than 1 ohms indicates a fault in the circuit. If the ground checked good, with a voltmeter, hook the negative lead to the negative battery terminal. With the positive meter lead, probe each wire at the transfer pump connector. If there is Voltage on either wire, there is a short to voltage somewhere in the harness. No voltage, reconnect the ECM, but not the Transfer pump. The last step involves the scan tool. Clear the codes. Connect a jumper wire between the Supply and Ground circuits. Turn the key on. If the code resets, it needs a transfer pump. If it doesn't set, it needs and ECM. Another test I found is using an old style round headlight bulb, and a couple jumper wires. Hook the jumper wires to each headlight bulb terminal. Connect each jumper wire to each transfer pump connector terminal. Turn the key on. the headlight should light brightly. If it does, you need a transfer pump.

You can still buy the original block mounted pump, but you'll have to buy it from a Cummins dealer. Chrysler will make you buy the retrofit kit to move the pump into the tank. You may have to modify the mounting bracket to fit the new pump.