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.
Diagnostic Code Index
2008 Pontiac Grand Prix BaseSECTION Diagnostic Code Index
WARNING: This page is about a different car, the 2007 Buick LaCrosse and 2007 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B1327 | Device Power 1 Circuit Low |
| DTC B1328 | Device Power 1 Circuit High |
| DTC B1516 | Battery Current Sensor Performance |
| DTC P0560 | System Voltage |
| DTC P0562 | System Voltage Low |
| DTC P0563 | System Voltage High |
| DTC P0615 | Starter Relay Control Circuit |
| DTC P0616 | Starter Relay Control Circuit Low Voltage |
| DTC P0617 | Starter Relay Control Circuit High Voltage |
| DTC P0621 | Generator L-Terminal Circuit |
| DTC P0622 | Generator F-Terminal Circuit |
| DTC P0625 | Generator F-Terminal Circuit Low Voltage |
| DTC P0626 | Generator F-Terminal Circuit High Voltage |
| DTC P1668 | Generator L-Terminal Control Circuit |
RENDER: 1.0x
NO RELATED
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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.