VOLVO
ECM-1801 - Engine coolant temperature (ECT) sensor. Faulty signal
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
2 ModelleS40 (1996–2004), V40 (1996–2004)
Modelle nach Baujahr und Motor anzeigen (2)
Was bedeutet der Fehlercode?
The ECM reads the engine coolant temperature sensor. If the sensor signal does not change after the engine starts, or a fault is registered in its signal wire, fault code ECM-1801 is set. The fault may lie in the sensor, the thermostat or the connector.
Mögliche Ursachen
- Defective engine coolant temperature sensor
- Defective thermostat
- Oxidation or a defective connector
- Open circuit or short circuit in the signal wire
Was Sie tun können
- 1Switch off the ignition and check the coolant temperature sensor connector for play and oxidation
- 2With a diagnostic tool, check in live data that the coolant temperature value rises as the engine warms up
- 3With a multimeter, check that the signal wire from the sensor is not broken and not shorted to ground or voltage
- 4A defective thermostat can keep the engine too cold, which looks like a sensor fault. Have a workshop check it
- 5If the fault remains after these checks, have a workshop replace the coolant temperature sensor
Symptome, die Sie bemerken können3
- The engine coolant temperature warning lamp is lit all the time
- The coolant temperature gauge shows maximum
- The electric cooling fan keeps running for a while after the engine is switched off
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.