Engine/Transmission (1998.5 - 2002) 24V Oil Pressure Sending Unit

[cjackg]

24V Oil Pressure Sender Failure

After the Oil Pressure Guage on my 2001 3500 (ETH-DEE) went to zero, I read all the posts and then checked prices on the sender with Dodge and with Cummins in Knoxville. Dodge wanted $284 and Cummins had it for $77 !

I proceeded to buy the part (4088390) from Cummins and installed it... . worked for a minute then went erratic... I tried disconnecting the batteries to reset the ECM but that only worked for a minute too.

Finally I took it to a Dodge dealer who re-flashed the ECM to synchronize it with the Cummins sender. Even with the Dodge $97 charge, I still came out better than buying the part from Dodge !

The moral is with the fully electronic nature of these engines, just replacing the failed sender may not work..... "They" never intended for us to do our own repairs !

 

[JohnMcIntyre]

Oil Pressure Sending Unit

Originally posted by jeddington

Hi All,



Can someone verify as to Cummins #4088390 being the correct number for a 99 Dodge? I want to make sure I order the correct one from a local Cummins dealer.



Thanks... . Jeff

Jeff, my sender failed at 39,020 about 6 weeks ago. :{ Click this TDR link from the 911 archive to learn a bit more. The actual sender lives high up on the crankcase behind the fuel filter assembly and is "awkward" to get at to say the very least. It also transpires that some senders are a three wire connection and some are a 2 wire connection, (probably for the 2nd gen 12valvers?). Check for the number of wires connected to the sender wiring connector and you'll know which one you have! The factory service manual has some pretty good pictures and explains it real well.