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.
2004 Cadillac DeVille Protection SeriesFACTORY OEM SERVICE PROCEDURE
Engine Electrical DTCS
ENGINE ELECTRICAL DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B1327 | Device Power Circuit Low |
| DTC B1328 | Device Power Circuit High |
| DTC B1513 | Charging System Volts Low |
| DTC B1514 | Charging System Volts High |
| DTC P0512 | Start Switch Circuit |
| DTC P0560 | System Voltage |
| DTC P0562 | System Voltage Low |
| DTC P0563 | System Voltage High |
| DTC P0615 | Starter Relay Control Circuit |
| DTC P0621 | Generator L-Terminal Circuit |
| DTC P0622 | Generator F-Terminal Circuit |
| DTC P1633 | Ignition 0 Switch Circuit |
| DTC P1634 | Ignition 1 Switch Circuit |
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.