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Cummins ISX CM870 (2003-06) Fault Code: 2355 PID: SPN: 2792 FMI: 3/3 VGT Air Control Shutoff Valve Circuit – shorted high. Open circuit or high signal voltage detected at the turbocharger control shutoff valve circuit.

Possible causes:

1)Open circuit in the engine harness signal circuit, connectors, or shutoff valve2)Signal circuit short to voltage source in the engine harness.

Possible repairs:

1)Replace the turbocharger control shutoff valve.2)Replace the ECM.

Cummins ISX CM870 (2003-06) Fault Code: 2353 PID: S146 SPN: 2791 FMI: 6/6 EGR Valve Control Circuit – Current Above Normal or Grounded Circuit. A short circuit to ground has been detected in the exhaust gas recirculation (EGR) valve motor circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2352 PID: S146 SPN: 2791 FMI: 3/3 EGR Valve Control Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at the EGR valve motor circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2351 PID: S146 SPN: 2791 FMI: 4/4 EGR Valve Control Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the EGR valve motor circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2349 PID: S146 SPN: 2791 FMI: 5/5 EGR Valve Control Circuit – Current Below Normal or Open Circuit. Motor terminal or motor coil open circuit has been detected by the engine control module (ECM).
Cummins ISX CM870 (2003-06) Fault Code: 2348 PID: 27 SPN: 27 FMI: 13/13 EGR Valve Self Calibration. EGR valve failed automatic self calibration procedure.
Cummins ISX CM870 (2003-06) Fault Code: 2347 PID: S309 SPN: 2790 FMI: 0/15 Turbocharger Compressor Outlet Temperature (Calculated) – Data Valid But Above Normal Operating Range – Least Severe Level. High turbocharger compressor outlet air temperature has been calculated by the engine control module (ECM).