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2002 GMC C7500 Topkick C7H042 8.1L code P1663
Posted to GM Driveability on 9/29/2014 1 Reply

DTC P1663 change engine oil lamp control circuit? I cannot find any diagnostic information on this code. Has anyone seen this code before and if so any suggestions on where to begin to fix it. I cleared the code and it came right back. Any help will be appreci...

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  Related Documents & Media  2002 GMC C7500 Topkick C7H042

 
Message Closed w/FIX

car Vehicle Data

2002 GMC C7500 Topkick C7H042

VIN 1GDM7H1E72
Engine8.1 L / 8 cyl / GAS
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsCode P1663

Trouble Codes

P1663Charging System Lamp Control Circuit Malfunction
Message Closed w/FIX

car Vehicle Data

2002 GMC C7500 Topkick C7H042

VIN 1GDM7H1E72
Engine8.1 L / 8 cyl / GAS
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsCode P1663

Trouble Codes

P1663Charging System Lamp Control Circuit Malfunction