P1664
1 4 Upshift Lamp Control Circuit.
- GMC
- Powertrain
- Manufacturer code
How this code is built
- P
- SystemPowertrain
- 1
- Defined byThe manufacturer
- 6
- AreaComputer and output circuits
- 64
- FaultThe specific fault in that area
Guide
Writing the guide for P1664. The first open of a code takes up to a minute.