i beleive i nee da new map sensor after reading on here just cleaning the sensor wont help where do i find a new map senesor for a good price if you guys can think of anything else i can do please help

Cummins supplies the new sensor for less... Question though do you have any kind of add on module (Edge Juice or simular)? Here is more information on the code... http://forum.mopar1973man.com/showthread.php/2571-P0237-Map-Sensor-Voltage-Too-Low

yes i do have an edge comp but i unlpuged it from the harness i did have other codes come up like 1688,0251 0237 but i cleared codes and the only one that keeps coming back is 0237 i cant get motor to rev above 1200rpms i have heard that you can unplug the map sensor to get more smoke i can do that and see if i can get more than 1200rpm. on the other hand moparman i have been falling your post on other sites and you have been exelant resource for information you have helped me out on more than one occasion

If you got the ECM plugged into the MAP sensor and the code is coming back without the Edge Comp plugged in then the sensor is bad. But if the code is coming while the Edge Comp is hooked up the the boost fooler is bad in the Edge Comp and would have to be repaired by Edge Products... As for the P1688 and P0251 codes are rarther serious codes and shouldn't be taken lightly. I would keep a close eye on the error codes and the fuel pressure for awhile...