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Turbocharger Turbine Inlet Temperature (Calculated) – Data Valid but Above Normal Operational Range – Least Severe Level
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 2346 PID: SPN: 2789 FMI: 0/15 LAMP: None SRT: |
Turbocharger Turbine Inlet Temperature (Calculated) – Data Valid but Above Normal Operational Range – Least Severe Level. Turbocharger turbine inlet temperature has exceeded the engine protection limit. |
Engine power derate. |
 Turbocharger Turbine Inlet Temperature (Calculated)
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Circuit Description
The exhaust gas temperature is calculated by the electronic control module (ECM). Exhaust gas temperature, or turbine inlet temperature, is derived by the electronic control module based on engine operating conditions such as intake manifold air temperature, engine speed, injection timing, intake manifold pressure, and fuel flow.
Component Location
There is not a physical exhaust gas temperature sensor in the system. The exhaust gas temperature is a calculation of exhaust gas temperature before the turbocharger and is also known as turbine inlet temperature.
NOTE: Some OEM’s have pyrometer gauges mounted in their chassis. Pyrometers measure turbine outlet temperature or the exhaust gas leaving the turbocharger and will not equal the value monitored with the exhaust gas temperature parameter in INSITE™ electronic service tool.
Shop Talk
The most common cause of this fault code is low boost. Low boost can be caused by several factors: leaking charge air cooler, failed charge air cooler piping or hose, loose charge air cooler clamps, failed intake manifold pressure sensor, failed variable geometry turbocharger, or failed turbocharger control valve.
NOTE: This code will most likely not
be active with no load in the shop. The engine must be loaded to trip this fault code and to determine if the failure has been found and fixed.
Refer to Troubleshooting Fault Code t05-2346
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