Alero L4-144 2.4L DOHC VIN T SFI (2000)
Oil Pressure Warning Lamp/Indicator: Description and Operation
The red oil pressure indicator turns on when the PCM transmits a Class 2 message to the instrument cluster indicating a low oil pressure condition. The
instrument cluster commands the oil pressure indicator on over the Class 2 serial data interface. If a loss of Class 2 serial data occurs, the oil pressure
indicator does not illuminate unless the indicator was illuminated when the event occurred. If a Class 2 data link fails, the oil pressure indicator does not
illuminate unless the indicator was illuminated prior to the Class 2 data link failure.