Possible causes
– Faulty Vacuum Pump Module
– Vacuum Pump Module harness is open or shorted
– Vacuum Pump Module circuit poor electrical connection.
– Faulty Engine Control Module (ECM)
– Vacuum Pump Module harness is open or shorted
– Vacuum Pump Module circuit poor electrical connection.
– Faulty Engine Control Module (ECM)
Tech notes
There is a factory service bulletin for the following Toyota models:
2005