Electronic fault codes active or high counts of inactive fault codes
View and troubleshoot the fault codes with INSITETM. Refer to the Troubleshooting and Repair Manual, CM21 00 and CM2150 Electronic Control System, Bulletin 4021570.
Coolant temperature is below specification
Refer to the Coolant Temperature is Below Normal symptom tree.
Lubricating oil does not meet specifications for operating conditions
Change the oil and filters. Refer to Procedures 007-037. See the Owners Manual and/or Operation
and Maintenance Manual for the engine being serviced for oil specifications.
OEM installed lubricating oil pressure switch, gauge or sensor is malfunctioning or is not in
correct location
Measure the lubricating oil pressure. Refer to Procedure 007-037. Operate the engine and compare readings to the vehicle’s OEM Gauge or oil pressure sensor/switch. See the OEM service manual.
Engine installed lubricating oil pressure sensor/ switch or circuit is malfunctioning (electronic
controlled fuel system)
Measure the lubricating oil pressure. Refer to Procedure 007-0371f equipped with an oil pressure
sensor, monitor the oil pressure with INSITETM. Operate the engine and compare readings. If
necessary, replace the oil pressure sensor /switch. See Procedure 019-066 in the Troubleshooting and Repair Manual, CM21 00 and CM2150 Electronic Control System, Bulletin 4021570.
Lubricating oil filter plumbing not routed correctly
Verify the routing of the lubricating filter plumbing is correct. Refer to Procedure 007-092.
Main oil pressure regulator is malfunctioning
Check the main oil pressure regulator assembly. Refer to Procedure 007-029.
Incorrect lubricating oil pump installed
Check if the correct lubricating oil pump part number is installed. Refer to Procedure 007-031
(for example a 6 cylinder oil pump used in a 4 cylinder engine). See the appropriate parts manual
and/or the QuickServe® Online Internet Website. If necessary replace the oil pump.
