- Faulty Immobilizer Lamp
- Immobilizer Lamp harness is open or shorted
- Immobilizer Lamp circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P0648 DescriptionThe Engine Control Module (ECM) monitors the Immobilizer Lamp Control Circuit. The ECM sets the OBDII code when the Immobilizer Lamp Control Circuit is not to factory specifications.
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