BAR-REACTION 4C9814 - Caterpillar

Engine Monitoring
The Electronic Control Module (ECM) monitors the operating parameters of the engine. The ECM will generate an event code if a specific engine parameter exceeds an acceptable range that is defined by the engine monitoring system. For information on the engine monitoring system, refer to Troubleshooting, "Engine Monitoring System".Cross-Reference Information for Event Codes
Event codes are generated when abnormal operating conditions exist. Table 1 is a list of the event codes for the engine. The event codes are cross-referenced with the appropriate procedure that can be used to troubleshoot the code.
Table 1
Cross-Reference from Diagnostic Trouble Codes to Functional Test or Procedure
J1939 Code and Description CDL Code and Description Troubleshooting Procedure
52-0
Engine Intercooler Temperature