Volvo All Engines (2010 Emissions) Fault Code: SPN 2629 FMI 17 PID: 404 Engine Turbocharger 1 Compressor Outlet Temperature – Least Severe Level

The Compressor Discharge Temperature Sensor is used to monitor the temperature of the air coming from the compressor side of the turbocharger.
The sensor signals are used for engine protection for high compressor out temperature and are monitored by the (ECU) Engine Control Unit.
The engine control module (ECM) will set a diagnostic trouble code (DTC) and derate the engine to avoid engine damage if the sensor signal is not within predetermined limits, or the signal is not rational.

Conditions for diagnostic trouble code (DTC):
1) The sensor signal is not rational

Probable cause
1) Compressor Discharge Temperature Sensor