VOLVO
ECM-6814 - Turbocharger (TC) control. Signal too high
System
Engine Control Module (ECM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
6 modelsC70 Cabriolet (1998–2005), S60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (13)
- Volvo C70 Cabriolet (1998–2005)2003–2005
- Volvo S60 (2001–2009)2002Engine B5204T5, B5234T3, B5234T7, B5244T3 only
- Volvo S60 (2001–2009)2003Engine B5204T5, B5234T3, B5234T7, B5244T3, B5254T2 only
- Volvo S60 (2001–2009)2004Engine B5204T5, B5234T3, B5234T7, B5254T2, B5254T4 only
- Volvo S80 (1999–2006)2002Engine B5204T5, B5234T7, B5244T3, B6294T only
- Volvo S80 (1999–2006)2003Engine B5204T5, B5234T7, B5244T3, B5254T2, B6294T only
- Volvo S80 (1999–2006)2004Engine B5204T5, B5234T7, B5254T2, B6294T only
- Volvo V70 (2000–2008)2002Engine B5204T5, B5234T3, B5234T7, B5244T3 only
- Volvo V70 (2000–2008)2003Engine B5204T5, B5234T3, B5234T7, B5244T3, B5254T2 only
- Volvo V70 (2000–2008)2004Engine B5204T5, B5234T3, B5234T7, B5254T2, B5254T4 only
- Volvo V70 XC / XC70 (2001–2007)2002
- Volvo V70 XC / XC70 (2001–2007)2003–2004All engines except: D5244T
- Volvo XC90 (2003–)2003–2004All engines except: D5244T
What does this fault code mean?
The engine control module (ECM) compares the measured boost pressure from the boost pressure sensor with the calculated boost pressure. If the ratio between them is greater than a certain value, the module treats it as a fault, and the code is set while turbocharger (TC) control is active. The cause may be air leakage after the turbocharger, or a loose or damaged boost pressure sensor.
Possible causes
- Air leakage after the turbocharger, between the turbocharger and the throttle unit
- The boost pressure sensor has come loose and then measures atmospheric pressure
- Defective boost pressure sensor
What you can do
- 1Read the code, clear it and road test the car to see whether it returns
- 2Make sure the boost pressure sensor sits correctly and has not worked loose
- 3Look for air leakage in the intake system, especially in the hose between the turbocharger and the throttle unit
- 4With diagnostic equipment, read boost pressure in live data with the ignition on and the engine off; the value should be about the same as the surrounding air pressure
- 5If no cause is found in the hoses, have a workshop try a new boost pressure sensor
Symptoms you may notice1
- Poor performance
What the fault can affect1
- Boost pressure is reduced
General guidance for car owners. Diagnosis on the car can point to a different cause.