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BOLT 0878464 - Caterpillar

0878464 BOLT Caterpillar parts BOLT
Alternative (cross code) number:
Caterpillar 0878464 BOLT

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Table 1
Diagnostic Trouble Codes for NOx Conversion Is Low
J1939 Code Description Notes
4364-17 Aftertreatment #1 SCR Catalyst Conversion Efficiency : Low - least severe (1) The ECM detects that the difference in NOx between the engine out NOx sensor and the tailpipe out NOx sensor is not within the expected range.
This value is measured when all other engine sensors are reading within a valid range and the exhaust gas volume is in a steady state.
Follow the troubleshooting procedure to identify the root cause of the problem.
Table 2
Required Tools
Tool Part Number Part Description Qty
A 431-7087 Test Kit (Refractometer) 1 Complete the procedure in the order in which the steps are listed.
Table 3
Troubleshooting Test Steps Values Results
1. Check for Other Active Diagnostic Codes
A. Establish communication between the electronic service tool and the Electronic Control Module (ECM). Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Check for active diagnostic codes
Diagnostic trouble code
Result: There is at least one other active diagnostic code
Repair: Troubleshoot all other active diagnostic codes before continuing with this procedure.
Refer to Troubleshooting, "Diagnostic Trouble Codes" for further information.
Result: A 4364-17 code is active or logged.

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