Volvo

Volvo All Engines (2017 Emissions) Fault Code: P050200 PID: EMS Vehicle Speed Sensor “A” Circuit Low This signal is sent from the (VECU) Vehicle Electronic Control Unit to the Cluster to present the actual vehicle speed. It is also used by the maximum speed limitation. The maximum speed limit can vary depending on customer option. Observable symptoms1) Speedometer shows no vehicle speed2) Cruise control does not function Probable cause1) Sensor2) Damaged connector3) Damaged wires Volvo All Engines (2017 Emissions) Fault Code: P050013 PID: EMS Wheel-Based Vehicle Speed Volvo All Engines (2017 Emissions) Fault Code: P04DD00 PID: EMS Cold Start EGR...

Volvo All Engines (2017 Emissions) Fault Code: P050600 PID: EMS Idle Control System – RPM Lower Than Expected The Engine Control Module (ECM) monitors the crankshaft angular acceleration using the flywheel sensor. The ECM monitors the camshaft position sensor to determine the engine’s position. The ECM calculates the average value of crankshaft angular acceleration for all six cylinders and compares the value to each individual cylinder’s angular acceleration. If a cylinder’s acceleration value is outside a specified range the ECM interprets this as a misfiring cylinder. The crankshaft average angular acceleration value is used by the ECM to determine cylinder...

Volvo All Engines (2017 Emissions) Fault Code: P050700 PID: EMS Idle Control System – RPM Higher Than Expected The Engine Control Module (ECM) monitors the crankshaft angular acceleration using the flywheel sensor. The ECM monitors the camshaft position sensor to determine the engine’s position. The ECM calculates the average value of crankshaft angular acceleration for all six cylinders and compares the value to each individual cylinder’s angular acceleration. If a cylinder’s acceleration value is outside a specified range the ECM interprets this as a misfiring cylinder. The crankshaft average angular acceleration value is used by the ECM to determine cylinder...

Volvo All Engines (2017 Emissions) Fault Code: P050C00 PID: EMS Cold Start Engine Coolant Temperature Performance The Engine Coolant Temperature Sensor is a thermistor. The resistance of the Engine Coolant Temperature Sensor changes inversely to the temperature of the engine coolant. When the coolant is cold, the sensor resistance is high. As the temperature of the coolant increases, the sensor resistance decreases.The Engine Control Module (ECM) monitors the voltage drop across the Engine Coolant Temperature Sensor.The coolant temperature signal is used to calculate fuel injection and to evaluate operating conditions of the engine coolant temperature. Examples of conditions that may...

Volvo All Engines (2017 Emissions) Fault Code: P050E00 PID: EMS Cold Start Engine Exhaust Temperature Too Low This diagnostic function indicates malfunction at the exhaust gas temperature (EGT) sensor. The purpose of the exhaust gas sensor is to contribute the relevant temperatures required for the temperature regulated aftertreatment diesel particulate filter regeneration control. A faulty EGT sensor can result with a failed aftertreatment (DPF) regeneration. Conditions for diagnostic trouble code (DTC):1) Exhaust temperature, Lower than expected Observable symptoms1) This function indicates that the NOx conversion efficiency is not correct Probable cause1) Aftertreatment exhaust gas temperature (EGT) sensors installed in the...