- Faulty Vacuum Pump Control
- Vacuum Pump Control harness is open or shorted
- Vacuum Pump Control circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P258d DescriptionThe Powertrain Control Module (PCM) monitors the Vacuum Pump Control Circuit signal. The PCM sets the OBDII code when the Vacuum Pump Control Circuit signal is out factory specifications.
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