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.
2001 Buick Century CustomFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Definitions
DIAGNOSTIC TROUBLE CODE DEFINITIONS (1)
| DTC (2) | Description | ||||
|---|---|---|---|---|---|
| B1328 | Charging Voltage High (Cavalier & Sunfire) | ||||
| B1482 | Battery Rundown Protection Circuit Low (Impala & Monte Carlo) | ||||
| B1483 | Battery Rundown Protection Circuit High (Impala & Monte Carlo) | ||||
| B1507 | High Power Control Circuit Low (Impala & Monte Carlo) | ||||
| B1508 | High Power Control Circuit High (Impala & Monte Carlo) | ||||
| P0560 | Voltage Out Of Range (Century, Grand Prix, Impala, Intrigue, Malibu, Monte Carlo & Regal) | ||||
| P0562 | Voltage Excessively Low (Alero, Cavalier, Grand Am & Sunfire) | ||||
| P0563 | Voltage Excessively High (Alero, Cavalier, Grand Am & Sunfire) | ||||
| P0620 | Fault Detection Circuit Malfunction (Alero & Grand Am) | ||||
| P0620 | Fault Detection Circuit Malfunction (Century, Grand Prix, Intrigue & Regal) | ||||
| P0620 | Fault Detection Circuit Malfunction (Impala & Monte Carlo) | ||||
| P0620 | Fault Detection Circuit Malfunction (Malibu) | ||||
| P0621 | Generator Turn-On Signal Circuit Voltage High Or Low (Alero, Cavalier, Grand Am & Sunfire) | ||||
| P0622 | Pulse Width Modulated Signal Out Of Range (Alero, Cavalier, Grand Am & Sunfire) | ||||
| P1637 | Output Driver Module Malfunction (Grand Prix) | ||||
|
|||||
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.