Sunfire L4-138 2.3L DOHC VIN D MFI (1995)
Oil Pressure Switch (For Fuel Pump): Testing and Inspection
SCAN TOOL TESTING
The scan tool displays oil pressure as "Low" or "OK."
The PCM checks the engine oil pressure continuously. If the oil pressure switch indicates low oil pressure at any time, the PCM will send
information through serial data to the Instrument Panel Cluster (IPC) to turn "ON" the "Low Oil Pressure" symbol lamp.
Also refer to Chart C-16A Fuel Pump and Engine Oil Pressure Switch Input to diagnose the Oil Pressure Switch Circuit. See: Powertrain
Management/Computers and Control Systems/Testing and Inspection
