For 1990-2009 cars only
Circuit Description
DTC B0602 indicates that the instrument cluster detects a Phase Lock Loop (PLL) oscillator synchronization error.
Conditions for Setting the DTC
The DTC B0602 sets when the instrument cluster detects a Phase Lock Loop (PLL) oscillator synchronization error during a diagnostic system self-test.
Action Taken When the DTC Sets
When the DTC B0602 sets, the instrument cluster illuminates the SERVICE VEHICLE SOON indicator.
Diagnostic Aids
DTC B0602 is an unrecoverable error. The PLL oscillator is not serviceable. Replace the instrument cluster. If DTC B0602 sets, perform the following actions:
- Refer to the most recent service information in order to obtain the approximate vehicle mileage.
- Contact an authorized Delco® service center.
- Return the instrument cluster to the service center.
