Volvo All Engines (2017 Emissions) Fault Code: P256300 PID: EMS Engine Intake Manifold #1 Pressure Circuit Range/Performance
Volvo All Engines (2017 Emissions) Fault Code: P256300 PID: EMS Engine Intake Manifold #1 Pressure Circuit Range/Performance
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) Requested VGT position over range
Observable symptoms
1) Low Power
Probable cause
1) Turbocharger
2) Faulty parameters
3) Stuck nozzle or cross shaft
Detailed information
1) Variable geometry turbocharger, stuck
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