ok i scanned my Magnum, what do these codes mean,and how do i fix them

As per the 2007 factory Service Manual P0129-Barometric pressure out-of-range low also know as the MAP sensor, the PCM has found a fault with the output voltage from the MAP sensor, being to low, possible causes high resistance on the 5v supply, high resistance in the MAP sensor circuit, or the sensor it self. I think located on top rear of intake manifold ?