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 B1370 | B1370: Device Ignition 1 (ON and START) Circuit |
| DTC B1380 | B1380: Device Ignition ACCESSORY Circuit |
| DTC B1385 | B1385: Device Ignition START Circuit |
| DTC B1428 | B1428: Ignition-Switched Power Relay 1 Circuit |
| DTC B1475 | B1475: Retained Accessory Power Circuit |
| DTC P2535 | P2535: Ignition One Voltage High |
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.