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, recalibrate the ECM.
When the engine coolant temperature nears the engine protection limits, the EGR valve will be closed to reduce the coolant temperature. This fault code is used as an information fault code, only indicating that the EGR valve has closed. No failure has occurred to cause this fault code. Other engine protection fault codes will be active if the engine coolant temperature has exceeded the engine protection limits.
No repair is necessary.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2639 PID: SID 324 SPN: 3251 FMI: 0 Aftertreatment Diesel Particulate Filter Differential Pressure – Data Valid But Above Normal Operating Range – Least Severe Level. The soot load of the aftertreatment diesel particulate filter has exceeded the recommended limits.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2638 PID: SPN: 3050 FMI: 13 Catalyst Efficiency – Out of Calibration. The temperature increase across the aftertreatment diesel oxidation catalyst is lower than expected.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2637 PID: SPN: 3050 FMI: 11 Catalyst Face Plugged – Root Cause Not Known. The front face of the aftertreatment diesel oxidation catalyst has been detected to be plugged with soot.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2636 PID: SID 027 SPN: 641 FMI: 9 VGT Actuator Driver Circuit – Abnormal Update Rate. No communications on the J1939 data link between the engine ECM and the smart VGT controller.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2635 PID: SID 027 SPN: 641 FMI: 11 VGT Actuator Driver Circuit – Condition Exists. A calibration mismatch between the VGT actuator and the ECM has been detected.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2634 PID: SID 027 SPN: 641 FMI: 12 VGT Actuator Controller – Bad Intelligent Device or Component. An internal error has been detected by the smart VGT controller.