Volvo All Engines (2010 Emissions) Fault Code: SPN 2629 FMI 0 PID: 404 Engine Turbocharger 1 Compressor Outlet Temperature

Posted by PerDiezel Solutions on June 6, 2026

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 calculated charge air temperature output from the turbo is too high

Observable symptoms
1) Engine de-rated

Probable cause
1) High ambient temperature
2) Low air pressure
3) A leak in the turbocharger inlet pipe can cause hot air to be sucked into the inlet system

Volvo All Engines (2010 Emissions) Fault Code: SPN 252 FMI 9 PID: Date

Volvo All Engines (2010 Emissions) Fault Code: SPN 251 FMI 9 PID: Time

Volvo All Engines (2010 Emissions) Fault Code: SPN 251 FMI 2 PID: Time

Volvo All Engines (2010 Emissions) Fault Code: SPN 251 FMI 19 PID: Time

Volvo All Engines (2010 Emissions) Fault Code: SPN 251 FMI 13 PID: Time

Volvo All Engines (2010 Emissions) Fault Code: SPN 251 FMI 12 PID: Time

WARNING!