ECM-4020 - Fuel tank pressure sensor. Faulty signal. Intermittent fault
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:
9 ModelleC70 Cabriolet (1998–2005), C70 Coupé (1998–2002), S60 (2001–2009), S70 (1997–2000), S80 (1999–2006), V70 (1997–2000), V70 (2000–2008), V70 XC (1998–2000), V70 XC / XC70 (2001–2007)
Modelle nach Baujahr und Motor anzeigen (16)
- Volvo C70 Cabriolet (1998–2005)1999, 2001–2002
- Volvo C70 Cabriolet (1998–2005)2000Alle Motoren außer: B5244S
- Volvo C70 Coupé (1998–2002)1999Alle Motoren außer: B5254S DENSO
- Volvo C70 Coupé (1998–2002)2000Alle Motoren außer: B5244S
- Volvo C70 Coupé (1998–2002)2001–2002
- Volvo S60 (2001–2009)2001Alle Motoren außer: B5244S, B5244S2, D5244T
- Volvo S70 (1997–2000)1999Nur Motor: B5204T3, B5204T4, B5234T3, B5234T7, B5254T
- Volvo S70 (1997–2000)2000Nur Motor: B5204T3, B5204T4, B5234T3, B5234T7, B5244T
- Volvo S80 (1999–2006)1999–2000Alle Motoren außer: B5244S, B5244S2, D5252T MSA 15.8
- Volvo S80 (1999–2006)2001Nur Motor: B5204T5, B5234T7, B5244T3, B6284T, B6294S
- Volvo V70 (1997–2000)1999Nur Motor: B5204T3, B5204T4, B5234T3, B5234T7, B5234T8, B5254T
- Volvo V70 (1997–2000)2000Alle Motoren außer: B5244S, B5244S2, B5244SG, B5244SG2, D5252T MSA 15.8
- Volvo V70 (2000–2008)2000Alle Motoren außer: D5252T MSA 15.8
- Volvo V70 (2000–2008)2001Nur Motor: B5204T5, B5234T3, B5234T7, B5244T3
- Volvo V70 XC (1998–2000)1999–2000
- Volvo V70 XC / XC70 (2001–2007)2001
Was bedeutet der Fehlercode?
At some point the engine control module received a signal from the fuel tank pressure sensor that did not make sense. The fault is stored as intermittent, meaning it comes and goes and may not be present right now. The sensor measures pressure in the fuel tank, and the leak diagnosis depends on a correct signal. The fault can be in the sensor, the wiring or the connectors.
Mögliche Ursachen
- Signal wire short-circuited to voltage, or open-circuited
- Open circuit in the ground wire
- Signal wire short-circuited to ground
- Supply wire short-circuited to ground
- Defective fuel tank pressure sensor
- Contact resistance in the connections
Was Sie tun können
- 1Read and note the fault code, clear it and test drive the car to see if it returns
- 2Check that the connector at the fuel tank pressure sensor is firmly seated and free from oxidation and corrosion
- 3Look for chafed or pinched wiring to the fuel tank pressure sensor, especially where the harness can move
- 4Use a multimeter to check that the signal wire has no contact with ground or positive and is not open-circuited
- 5Have you got a diagnostic tool: follow fuel tank pressure in live data with the ignition on and check that the value changes smoothly without jumping
- 6Have a workshop with diagnostic equipment check the fuel tank pressure sensor if the fault comes back
Symptome, die Sie bemerken können1
- No noticeable symptoms for the driver
Was der Fehler beeinflussen kann1
- The fuel system leak diagnosis is disabled
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.