Volvo All Engines (2010 Emissions) Fault Code: SPN 1127 FMI 11 PID: PSID 98 Engine Turbocharger 1 Boost Pressure

The engine control module (ECM) monitors the intake manifold pressure (IMP) sensor and controls the boost air system (mainly controlled by the VGT) and the engine turbocharger compressor bypass valve. The ECM also uses parameters like engine speed (RPM) and turbocharger speed to make a calculation of the IMP. This estimated value should not differ too much from the measured value.

Conditions for diagnostic trouble code (DTC):
1) Regulation of Variable Geometry Turbo (VGT) or Exhaust Gas Recirkulation (EGR) system not possible

Probable cause
1) Turbocharger