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 Pontiac Aztek Base, FWDFACTORY OEM SERVICE PROCEDURE
Lighting DTCS
LIGHTING DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B1354 | Courtesy Lamps Control Circuit Open |
| DTC B1397 | Dimming Reference Voltage Circuit Low |
| DTC B1398 | Dimming Reference Voltage Circuit High |
| DTC B1482 | Supply Voltage Circuit Low |
| DTC B2532 | Front Foglamps Control Circuit Low |
| DTC B2533 | Front Foglamps Control Circuit High |
| DTC B2552 | Backup Lamps Control Circuit Low |
| DTC B2553 | Backup Lamps Control Circuit High |
| DTC B2577 | Headlamp Control Circuit Low |
| DTC B2578 | Headlamp Control Circuit High |
| DTC B2587 | Parklamp Control Circuit Low |
| DTC B2588 | Parklamp Control Circuit High |
| DTC B2602 | Daytime Running Lamp Control Circuit Low |
| DTC B2603 | Daytime Running Lamp Control Circuit High |
| DTC B2613 | Passenger Compartment Dimming Input Circuit High |
| DTC B2617 | Passenger Compartment Dimming Circuit Low |
| DTC B2618 | Passenger Compartment Dimming Circuit High |
| DTC B2627 | Courtesy Lamps Output Circuit Low |
| DTC B2628 | Display Dimming Pulse Width Modulation (PWM) Output Circuit High |
| DTC B2645 | Ambient Light Sensor Circuit |
| DTC B2647 | Ambient Light Sensor Circuit Low |
| DTC B2648 | Ambient Light Sensor Circuit High |
| DTC B2665 | Parklamp Switch Circuit High |
| DTC B2742 | Front Fog Lamp Switch Circuit Low |
| DTC B3840 | Parklamp Signal Circuit Low |
| DTC B3841 | Parklamp Signal Circuit High |
| DTC B3857 | Headlamp High Beam Signal Circuit |
| DTC P0504 | Brake Switch Circuit 1-2 Correlation |
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.
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