PIN AS 1531653 - Caterpillar

Table 1
J1939 Code and Description CDL Code and Description Comments
2433-1
Engine Exhaust Manifold Bank #2 Temperature #1 : Low - most severe (3) E324 (3)
Low Right Exhaust Temperature The Electronic Control Module (ECM) has detected that the Hydrocarbon (HC) levels in the Selective Catalyst Reduction (SCR) catalyst are at a very high level. The engine will shutdown after a predetermined time.
2433-18
Engine Exhaust Manifold Bank #2 Temperature #1 : Low - moderate severity (2) E324 (2)
Low Right Exhaust Temperature The ECM has detected that the HC levels in the SCR catalyst are at a high level.
2434-1
Engine Exhaust Manifold Bank #1 Temperature #1 : Low - most severe (3) E323 (3)
Low Left Exhaust Temperature The ECM has detected that the HC levels in the SCR catalyst are at a very high level. The engine will shutdown after a predetermined time.
2434-18
Engine Exhaust Manifold Bank #1 Temperature #1 : Low - moderate severity (2) E323 (2)
Low Left Exhaust Temperature The ECM has detected that the HC levels in the SCR catalyst are at a high level. When the engine is idling or exhaust temperatures are low for extended periods of time, the hydrocarbons in the exhaust stream will collect on the Selective Catalyst Reduction (SCR) catalyst. When enough hydrocarbon has collected on the SCR catalyst, and the exhaust temperatures increase too quickly, the SCR catalyst can be damaged.To protect the hardware in the SCR system, the Electronic Control Module (ECM) monitors how much Hydrocarbon (HC) is building up on the SCR catalyst. The ECM will take action by attempting to increase the engine exhaust temperatures to reduce the amount of hydrocarbon during normal engine operation. In order for this strategy to work, the equipment must be stationary with the parking brake engaged (if equipped).If the engine ECM determines it cannot get the HC levels below an acceptable threshold after a period of time, there will be an alert given to the operator to takeaction. If action is taken, the alert will clear.If the operator is not present, or cannot take action, and the exhaust temperatures do not increase after a certain period of time, the engine will shutdown. The engine may be restarted, but if the engine ECM determines that the exhaust temperatures have not risen high enough or the hydrocarbon levels on the SCR catalyst have not started to drop, the engine will be shutdown again.To get the hydrocarbon buildup off the SCR catalyst once the alert or the shutdown has occurred, the operator must either put the equipment to work as soon as possible to elevate the exhaust temperatures