Engine/Transmission (1998.5 - 2002) What does this code mean?

[Slightly Modified]

My truck kicked into limp mode the other day and the check engine light came on. I got a 1693, which I know is for the map sensor, but I also got 0237. Anyone know what this one means?Thanks

 

[johncameron]

P0237 (M) Map Sensor Voltage Too Low MAP sensor voltage input below the minimum acceptable voltage

 

[Ram666]

1693 means a code has been set in a companion module. meaning your chrysler computer see;s a code in the cummins engine computer.

 

[johncameron]

BTW, I've had code 1693 ever since I knew hou to read codes on my rig. From what I understand it is not anything to worry about but 0237 sounds like a bad MAP sensor or a plumbing problem between your turbo and the intake. Check all the rubber boots for leaks.

JC