Check Gauges

If coolant temperature is too high or oil pressure is too low, LED illuminates to alert driver of condition indicated by gauges. IPC constantly monitors coolant temperature and oil pressure with engine running. Engine coolant information is sent to IPC over Class 2 serial data line from Vehicle Control Module/Powertrain Control Module (VCM/PCM). Oil pressure information is sent to IPC over designated circuit connected to oil pressure sending unit. As a check, LED illuminates for 3 seconds after ignition is turned on.