MUFFLER 5040403 - Caterpillar

Table 1
Event Code    
Code and Description     Conditions which Generate this Code     System
Response    
E841(1) Cyl #1 Exhaust Port Temp Deviating Low
E842(1) Cyl #2 Exhaust Port Temp Deviating Low
E843(1) Cyl #3 Exhaust Port Temp Deviating Low
E844(1) Cyl #4 Exhaust Port Temp Deviating Low
E845(1) Cyl #5 Exhaust Port Temp Deviating Low
E846(1) Cyl #6 Exhaust Port Temp Deviating Low
E847(1) Cyl #7 Exhaust Port Temp Deviating Low
E848(1) Cyl #8 Exhaust Port Temp Deviating Low
E849(1) Cyl #9 Exhaust Port Temp Deviating Low
E850(1) Cyl #10 Exhaust Port Temp Deviating Low
E851(1) Cyl #11 Exhaust Port Temp Deviating Low
E852(1) Cyl #12 Exhaust Port Temp Deviating Low
E853(1) Cyl #13 Exhaust Port Temp Deviating Low
E854(1) Cyl #14 Exhaust Port Temp Deviating Low
E855(1) Cyl #15 Exhaust Port Temp Deviating Low
E856(1) Cyl #16 Exhaust Port Temp Deviating Low
E857(1) Cyl #17 Exhaust Port Temp Deviating Low
E858(1) Cyl #18 Exhaust Port Temp Deviating Low
E859(1) Cyl #19 Exhaust Port Temp Deviating Low
E860(1) Cyl #20 Exhaust Port Temp Deviating Low     The cylinder exhaust temperature is lower than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.     The code is logged.    
Table 2
Event Code    
Code and Description     Conditions which Generate this Code     System
Response    
E841(3) Cyl #1 Exhaust Port Temp Deviating Low
E842(3) Cyl #2 Exhaust Port Temp Deviating Low
E843(3) Cyl #3 Exhaust Port Temp Deviating Low
E844(3) Cyl #4 Exhaust Port Temp Deviating Low
E845(3) Cyl #5 Exhaust Port Temp Deviating Low
E846(3) Cyl #6 Exhaust Port Temp Deviating Low
E847(3) Cyl #7 Exhaust Port Temp Deviating Low
E848(3) Cyl #8 Exhaust Port Temp Deviating Low
E849(3) Cyl #9 Exhaust Port Temp Deviating Low
E850(3) Cyl #10 Exhaust Port Temp Deviating Low
E851(3) Cyl #11 Exhaust Port Temp Deviating Low
E852(3) Cyl #12 Exhaust Port Temp Deviating Low
E853(3) Cyl #13 Exhaust Port Temp Deviating Low
E854(3) Cyl #14 Exhaust Port Temp Deviating Low
E855(3) Cyl #15 Exhaust Port Temp Deviating Low
E856(3) Cyl #16 Exhaust Port Temp Deviating Low
E857(3) Cyl #17 Exhaust Port Temp Deviating Low
E858(3) Cyl #18 Exhaust Port Temp Deviating Low
E859(3) Cyl #19 Exhaust Port Temp Deviating Low
E860(3) Cyl #20 Exhaust Port Temp Deviating Low     The cylinder exhaust temperature is lower than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.     The code is logged.
The engine is shut down.    If the engine is shut down due to a low exhaust temperature, the power to the ECM must be cycled in order to restart.Probable Causes
Monitoring system parameters
Inlet air restriction
Operation with a light load
Faulty thermocouple
Valve lash settings
Low cylinder compressionRecommended Actions
Monitoring System Parameters
Ensure that the monitoring system parameters for the exhaust temperature module are set correctly. Ensure that the monitoring system parameters for the exhaust port temperatures are set correctly. Refer to Troubleshooting, "Event Codes" for information that relates to the default parameters, ranges, and delay times of the monitoring system parameters that are for the