My brother owns a 2004 Mustang GT with a Saleen Series IV supercharger installed on it for the last six months with no problems. Then a couple of days ago the car would not start so he replaced the battery and it ran fine for a couple of days with no problems. Then all of a sudden there is now a check engine light on and the car is running a little rough after it gets to normal operating temps. The codes are P1152 and P0152. Any suggestions on how to fix the problem?
