VOLVO
ECM-1801 - Engine coolant temperature (ECT) sensor. Faulty signal
Układ
Sterownik silnika (ECM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
2 modeleS40 (1996–2004), V40 (1996–2004)
Pokaż modele wg rocznika i silnika (2)
Co oznacza ten kod błędu?
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.
Możliwe przyczyny
- Defective engine coolant temperature sensor
- Defective thermostat
- Oxidation or a defective connector
- Open circuit or short circuit in the signal wire
Co możesz zrobić
- 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
Objawy, które możesz zauważyć3
- 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
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.