VOLVO
ECM-270B - Engine coolant temperature (ECT) sensor. Signal missing
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
3 modellerC70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Vis modeller per årsmodell og motor (7)
- Volvo C70 (2006–2013)2006–2007Kun motor: B5254T3
- Volvo C70 (2006–2013)2008–2013Kun motor: B5254T7
- Volvo S40 (2004–2013)2005–2007Kun motor: B5254T3
- Volvo S40 (2004–2013)2008Kun motor: B5254T3, B5254T7
- Volvo S40 (2004–2013)2009–2012Kun motor: B5254T7
- Volvo V50 (2004–2013)2005–2007Kun motor: B5254T3
- Volvo V50 (2004–2013)2008–2012Kun motor: B5254T7
Hva betyr feilkoden?
Although the fault is shown as a missing signal, the sensor reads a lower temperature than the one the engine control module (ECM) has calculated since the engine started. If the calculated temperature becomes higher than the sensor signal, the code is set.
Mulige årsaker
- The temperature sensor is damaged
- The coolant thermostat is damaged
Hva du kan gjøre
- 1Disconnect the connector to the electric cooling fan before working in the engine bay, since the fan can run even when the ignition is off
- 2Check the connector on the temperature sensor for contact resistance and oxidation
- 3Check the coolant level and that the coolant has the right freeze protection, since a frozen sensor can cause this code
- 4With diagnostic equipment, read the engine temperature after starting and see whether it rises in step with warm-up
- 5Have a workshop replace the coolant thermostat or the temperature sensor if the fault remains
Symptomer du kan merke2
- Malfunction indicator lamp (MIL) on
- The engine is hard to start
Hva feilen kan påvirke3
- Boost pressure is set to a basic value
- The coolant temperature is calculated instead of measured, and catalytic converter heating, starting adaptation, and idle and misfire diagnostics are disabled
- The electric cooling fan runs at a predefined speed
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