Volvo All Engines (2017 Emissions) Fault Code: P255611 PID: EMS Engine Coolant Level Sensor/Switch
Volvo All Engines (2017 Emissions) Fault Code: P255611 PID: EMS Engine Coolant Level Sensor/Switch
Circuit description
Voltage from the engine control module (ECM) is applied to the engine coolant level (ECL) switch when the ignition switch is in the ON position. When the reservoir runs low, the float will be lowered on the coolant level sensor. The signal to the ECM will indicate low coolant.
If the engine control module (ECM) detects that the coolant level switch has experienced a power loss or that the level can not be detected, the ECM will set a diagnostic trouble code (DTC) and derate the engine to avoid engine damage.
Conditions for diagnostic trouble code (DTC)
Coolant level switch closed
Probable cause
1) Connector
2) Wiring harness
3) Engine Coolant Level (ECL) Sensor
4) Low coolant level
5) Engine control module (ECM)
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