VOLVO
ECM-B10E811 - Secondary Battery Relay "A". General Electrical Failures. Circuit short to ground
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
12 modelsC30 (2007–2013), S40 (2004–2013), S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V50 (2004–2013), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (25)
- Volvo C30 (2007–2013)2011–2013Engine D4162T only
- Volvo S40 (2004–2013)2011–2012Engine D4162T only
- Volvo S60 (2011–)2011Engine B4164T, B4164T3, D4162T only
- Volvo S60 (2011–)2012All engines except: B4204T7, B5254T5, B6304T4
- Volvo S60 (2011–)2013–2014All engines except: B4204T7, B6304T4
- Volvo S60 (2011–)2015All engines except: B6304T3, B6304T4, B6304T5
- Volvo S80 (2007–)2011Engine B4164T only
- Volvo S80 (2007–)2012Engine B4164T, B4164T2, D4162T, D5204T3, D5244T11, D5244T15 only
- Volvo S80 (2007–)2013–2014All engines except: B4204T6, B4204T7, B6304T4, B6324S4, B6324S5
- Volvo S80 (2007–)2015All engines except: B6304T4, B6324S4, B6324S5
- Volvo V40 (2013–)2013–2015
- Volvo V40 Cross Country (2013–)2013–2015
- Volvo V50 (2004–2013)2011–2012Engine D4162T only
- Volvo V60 (2011–)2011Engine B4164T, B4164T3, D4162T only
- Volvo V60 (2011–)2012All engines except: B4204T7, B6304T4
- Volvo V60 (2011–)2013–2014All engines except: B4204T7, B6304T4, D82PHEV
- Volvo V60 (2011–)2015All engines except: B6304T3, B6304T4, B6304T5, D82PHEV, D87PHEV
- Volvo V60 Cross Country (2015–)2015
- Volvo V70 (2008–)2011Engine B4164T only
- Volvo V70 (2008–)2012All engines except: B4204T7, B5254T10, B6304T4, B6324S5
- Volvo V70 (2008–)2013–2014All engines except: B4204T7, B6304T4, B6324S5
- Volvo V70 (2008–)2015All engines except: B6304T4
- Volvo XC60 (2009–)2012Engine D5204T3, D5244T11, D5244T15, D5244T17 only
- Volvo XC60 (2009–)2013–2015All engines except: B4204T7, B6304T4, B6324S4, B6324S5
- Volvo XC70 (2008–)2012–2015All engines except: B6304T4, B6324S4, B6324S5
What does this fault code mean?
The engine control module monitors the secondary battery relay, which connects the secondary battery to the car's electrical system when the engine is restarted after auto-stop. The code is set when the signal wire between the engine control module and the relay is short-circuited to ground, and automatic start and stop is then switched off.
Possible causes
- Loose or oxidised connector
- Signal wire short-circuited to ground
- Open circuit in the signal wire
- Damaged secondary battery relay
What you can do
- 1Check that the relevant fuses are intact
- 2Check the connector at the secondary battery relay for looseness, oxidation and contact resistance
- 3With a multimeter, check that the signal wire has no contact with ground (the body), with the connectors disconnected
- 4If the relay is the only thing left to check, have a workshop replace it
Symptoms you may notice2
- Automatic start/stop of the engine does not work while driving
- Automatic start/stop of the engine does not work at idle
What the fault can affect1
- The automatic engine start/stop function is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.