VOLVO
ECM-2120 - Front heated oxygen sensor (HO2S), control element. Signal too low
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Dieser Fehlercode hat je nach Modell, Modelljahr oder Motor unterschiedliche Bedeutungen. Wählen Sie die Bedeutung, die für Ihr Fahrzeug gilt.
Gilt für folgende Modelle:
7 ModelleC70 Cabriolet (1998–2005), C70 Coupé (1998–2002), S60 (2001–2009), S70 (1997–2000), S80 (1999–2006), V70 (1997–2000), V70 (2000–2008)
Modelle nach Baujahr und Motor anzeigen (19)
- Volvo C70 Cabriolet (1998–2005)2000Nur Motor: B5244S
- Volvo C70 Coupé (1998–2002)1999Nur Motor: B5254S DENSO
- Volvo C70 Coupé (1998–2002)2000Nur Motor: B5244S
- Volvo S60 (2001–2009)2001, 2009Nur Motor: B5244S, B5244S2
- Volvo S60 (2001–2009)2002Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo S60 (2001–2009)2003–2005Nur Motor: B5244S, B5244S2, B5244S6, B5244SG, B5244SG2
- Volvo S60 (2001–2009)2006Nur Motor: B5244S, B5244S2, B5244S6, B5244SG
- Volvo S60 (2001–2009)2007–2008Nur Motor: B5244S, B5244S2, B5244SG
- Volvo S70 (1997–2000)1999Nur Motor: B5254S DENSO
- Volvo S70 (1997–2000)2000Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo S80 (1999–2006)1999–2000Nur Motor: B5244S, B5244S2
- Volvo S80 (1999–2006)2001, 2006Nur Motor: B5244S, B5244S2, B5244SG
- Volvo S80 (1999–2006)2002–2005Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo V70 (1997–2000)1999Nur Motor: B5254S DENSO
- Volvo V70 (1997–2000)2000Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo V70 (2000–2008)2001, 2007–2008Nur Motor: B5244S, B5244S2, B5244SG
- Volvo V70 (2000–2008)2002Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo V70 (2000–2008)2003–2005Nur Motor: B5244S, B5244S2, B5244S6, B5244SG, B5244SG2
- Volvo V70 (2000–2008)2006Nur Motor: B5244S, B5244S2, B5244S6, B5244SG
Was bedeutet der Fehlercode?
The engine control module has detected that the control circuit for the front heated oxygen sensor is short-circuited to ground or voltage, or that the circuit is open. The sensor measures the oxygen content in the exhaust and is used to control the fuel mixture, so when the sensor circuit fails the fuel trim is switched off.
Mögliche Ursachen
- Signal cable short-circuited to voltage
- Signal cable short-circuited to ground
- Open-circuit in the signal cable
- Damaged heated oxygen sensor or damaged control circuit for the sensor
- Poor contact or oxidation in the heated oxygen sensor connector
Was Sie tun können
- 1Read the status of the diagnostic trouble code and note what it shows; then clear the code and road test the car
- 2Check the connector on the heated oxygen sensor for contact resistance and oxidation; disconnect and reconnect it with clean, tight contacts
- 3Do not use rust solvent spray or grease in the heated oxygen sensor connector
- 4Inspect the wiring to the heated oxygen sensor for chafing, pinching and breaks, especially where it runs close to the exhaust pipe
- 5Have a diagnostic tool? Follow the front oxygen sensor value in live data with the engine running at idle and check whether it swings evenly after a while
- 6If the fault returns despite these checks, have a workshop check the wiring and replace the oxygen sensor if needed
Symptome, die Sie bemerken können1
- The malfunction indicator lamp (MIL) comes on
Was der Fehler beeinflussen kann1
- The fuel trim is switched off, so the fuel mixture is controlled without feedback from the sensor
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.