Electronic fault codes active or high counts of inactive fault codes
View and troubleshoot the fault codes with NSITETM. Refer to the Troubleshooting and Repair
Manual, CM21 00 and CM2150 Electronic Control System, Bulletin 4021570.
Fuel grade is not correct for the application or the fuel quality is poor
Operate the engine from a tank of high-quality fuel. Refer to the Owners Manual and/or Operation and Maintenance Manual for the engine being serviced for fuel specifications.
Air in the fuel system
Check for air in the fuel system. Refer to Procedure 006-003.
Coolant temperature is above specification
Refer to Coolant Temperature Above Normal – Gradual Overheat Symptom tree .
Overhead adjustments are not correct
Measure and adjust the overhead settings. Refer to Procedure 003-004.
Injector is malfunctioning
Perform the single-cylinder cutout test. Replace the injectors as necessary. Refer to Procedures
006-026 and 014-008 .
Camshaft timing is not correct (after engine rebuild or repair)
Check the gear train timing alignment. Refer to Procedure 001-008.
Piston is misassembled
Remove and inspect the piston. Refer to Procedure 002-004 the cylinder head and inspect the
orientation and tops of the pistons for debris.
Procedure 001-054 for piston orientation and if necessary, piston removal.