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Cummins ISX CM870 (2003-06) Fault Code: 2552 PI...

The ECM estimates the amount of fuel injected into the front and rear banks of the engine by analyzing the acceleration of the crankshaft. This fault is set active when...

Cummins ISX CM870 (2003-06) Fault Code: 2374 PI...

The exhaust gas pressure sensor shares supply and return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to...

Cummins ISX CM870 (2003-06) Fault Code: 2551 PI...

The ECM estimates the amount of fuel injected into the front and rear banks of the engine by analyzing the acceleration of the crankshaft. This fault is set active when...

Cummins ISX CM870 (2003-06) Fault Code: 255 PID...

If there is an external shutdown system on the vehicle, make sure it is not miswired and feeding voltage into the fuel shutoff supply circuit. Possible causes: 1)Open circuit in...

Cummins ISX CM870 (2003-06) Fault Code: 254 PID...

Inspect the fuel shutoff supply circuit for external wires that can be spliced in to power another device. Remove any extra wires that are found in the circuit. If there...

Cummins ISX CM870 (2003-06) Fault Code: 249 PID...

Possible causes: 1)Open return circuit in the harness, connectors, or sensor2)Open signal circuit or shorted to a voltage source. Possible repair: 1)Replace the OEM harness.2)Replace the ambient air temperature sensor.3)Replace...