Diagnostic Trouble Code Definitions
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, 2003 Chevrolet Blazer, and 2002 GMC Sonoma. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC TROUBLE CODE DEFINITIONS
| DTC (1) | Description | ||||
|---|---|---|---|---|---|
| B1327 | Battery/Source Voltage Low | ||||
| P0562 | Low System Voltage | ||||
| P0563 | High System Voltage | ||||
| P0621 | High Or Low Generator Turn On Signal | ||||
| P0622 | (2) Out Of Range Duty Cycle Signal | ||||
| P1637 | (2) High Or Low Generator Turn On Signal | ||||
| P1638 | (2) Out Of Range Duty Cycle Signal | ||||
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