Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Cadillac CTS AutomaticFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Definitions
DIAGNOSTIC TROUBLE CODE DEFINITIONS
| DTC (1) | Description | ||
|---|---|---|---|
| B1327 | Battery/Source Voltage - Low | ||
| B1328 | Battery/Source Voltage - High | ||
| B1513 | Charging System Voltage Out-Of-Range - Low | ||
| B1514 | Charging System Voltage Out-Of-Range - High | ||
| P0560 | System Voltage | ||
| P0562 | System Voltage - Low | ||
| P0563 | System Voltage - High | ||
| P0625 | Generator F-Terminal Circuit - Low | ||
| P0626 | Generator F-Terminal Circuit - High | ||
| P2500 | Low Signal Voltage On Generator Turn On Signal Circuit | ||
| P2501 | High Signal Voltage On Generator Turn On Signal Circuit | ||
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Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.