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Cummins ISX CM870 (2003-06) Fault Code: 9121 PID: S146 SPN: 2791 FMI: 0/15 EGR Valve Actuator Over Temperature (Calculated) – Data Above Normal Range – least severe level.
The ECM calculates the temperature of the EGR valve motor. If the ECM detects excessive temperatures for a calibrated period of time this fault is recorded and the valve is commanded closed. This action is for protection of the valve only; this fault code is not indicative of any component failure. Once the ECM detects normal EGR valve temperatures, the fault code will go inactive and the EGR valve operation will resume.
NOTE: During this event, there will be no noticeable symptoms. This troubleshooting tree should not be considered if there is a performance complaint.
A combination of frequent valve movement and elevated coolant temperatures can lead to this fault code.
Cummins ISX CM870 (2003-06) Fault Code: 2973 PID: P102 SPN: 102 FMI: 2/2 Intake Manifold Pressure – data incorrect. The ECM has detected an intake manifold pressure signal that is too high or low for current engine operating conditions.
Cummins ISX CM870 (2003-06) Fault Code: 2964 PID: P105 SPN: 105 FMI: 0/16 Intake Manifold 1 Temperature – Data Valid But Above Normal Operating Range – Least Severe Level. Intake manifold air temperature signal indicates intake manifold air temperature is above engine protection warning limit.
Cummins ISX CM870 (2003-06) Fault Code: 2963 PID: P110 SPN: 110 FMI: 0/16 Engine Coolant Temperature – Data Valid But Above Normal Operating Range – Least Severe Level. Engine coolant temperature is above the engine protection warning limit.
Cummins ISX CM870 (2003-06) Fault Code: 2962 PID: P412 SPN: 412 FMI: 0/16 Exhaust Gas Recirculation Temperature – Data Valid But Above Normal Operating Range – Moderately Severe Level. Exhaust gas recirculation (EGR) temperature has exceeded the engine protection limit.
Cummins ISX CM870 (2003-06) Fault Code: 2961 PID: P412 SPN: 412 FMI: 0/15 Exhaust Gas Recirculation Temperature – Data Valid But Above Normal Operating Range – Least Severe Level. Exhaust gas recirculation (EGR) temperature has exceeded the engine protection limit.
Cummins ISX CM870 (2003-06) Fault Code: 2554 PID: P95 SPN: 1209 FMI: 2/2 Exhaust Gas Pressure – Data Erratic, Intermittent or Incorrect. The exhaust gas pressure sensor is reading an erratic value.