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 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B1327 | B1327: Device Voltage Circuit Low |
| DTC B1328 | B1328: Device Voltage Circuit High |
| DTC B1420 | B1420: Device Voltage Circuit |
| DTC B1516 | B1516 08: Battery Current Sensor Signal Invalid B1516 66: Battery Current Sensor Wrong Mounting Position |
| DTC C0896 | C0896: Device Voltage Range/Performance |
| DTC P0560 (3.8L) | P0560: System Voltage |
| DTC P0560 (3.6L/5.3L) | P0560: System Voltage |
| DTC P0562 | P0562: System Voltage Low |
| DTC P0563 | P0563: System Voltage High |
| DTC P0615 | P0615: Starter Relay Control Circuit |
| DTC P0616 | P0616: Starter Relay Control Circuit Low Voltage |
| DTC P0617 | P0617: Starter Relay Control Circuit High Voltage |
| DTC P0621 | P0621: Generator L-Terminal Circuit |
| DTC P0622 | P0622: Generator F-Terminal Circuit |
| DTC P0625 | P0625: Generator F-Terminal Circuit Low Voltage |
| DTC P0626 | P0626: Generator F-Terminal Circuit High Voltage |
| DTC P1668 | 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.