where do I locate the crankshaft position sensor A

Hello, this code doesn't mean that you need to replace the sensor. In fact, it's quite unlikely. Have proper diagnostic testing performed. If you insist on replacing a part (quite unnecessarily, most likely), obtain a repair manual like ALL DATA or MITCHELL ONE online that you can purchase access to. We can't provide copyrighted information here. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops