PACCAR PX-6 CM2150 (2007-09) Fault Code: 2357 PID: SID 146 SPN: 2791 FMI: 7 EGR Valve Control Circuit – Mechanical System Not Responding Properly or Out of Adjustment. The EGR motor has exceeded the duty cycle limit, indicating a stuck open EGR valve.
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM. Use the following procedure in the corresponding Troubleshooting and Repair Manual for the engine being serviced.
This fault code is triggered when the EGR valve motor is unable to move the EGR valve in the open position. This is normally caused by a restriction in the EGR valve not allowing the EGR valve to move to the commanded position.
The fault code will be inactive at key-on. It will only go active if the EGR valve is commanded open and the EGR valve is unable to move to the commanded position.
The aftertreatment system must be inspected after making the appropriate repair outlined in this fault code troubleshooting tree. Progressive damage to the aftertreatment system may have occurred. Perform the aftertreatment initial check procedure to test for a damaged diesel particulate filter (DPF).
1)For reuse guidelines for ISB CM2150 engines, use the following procedure in the ISB CM2150 Service Manual, Bulletin 4021578. Refer to Procedure 014-013 in Section 14.
2)For reuse guidelines for ISC and ISL CM2150 engines, use the following procedure in the ISC and ISL CM2150 Service Manual, Bulletin 4021569. Refer to Procedure 014-013 in Section 14.
Possible causes:
1)Fuel Injector wiring harness shorted to ground, open circuit, or shorted to power supply.
Possible repairs:
1)Replace the EGR valve assembly.
2)Replace the damaged aftertreatment component.
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