[BNaylor]

Welcome to AF.

The DTC indicates a problem with the MAP sensor (high input). Have your friend double check the work and make sure the MAP sensor is installed properly. Located behind the upper intake manifold about mid center towards firewall. Check vacuum lines to the intake manifold, sensor and the sensor electrical connector. Common problem after doing a gasket job on a 3100 engine. If all that is good maybe the MAP sensor went bad.