VOLVO
ECM-P000B77 - Exhaust (B) Camshaft Position Slow Response Bank 1. Mechanical Failures. Commanded position not reachable
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–)
Show models by year and engine (21)
- Volvo S60 (2011–)2011All engines except: B6304T4, D4162T, D5204T2, D5244T10
- Volvo S60 (2011–)2012Engine B4164T, B4164T2, B4164T3, B4204T7, B5254T5 only
- Volvo S60 (2011–)2013–2014Engine B4164T, B4164T2, B4164T3, B4204T7 only
- Volvo S60 (2011–)2015Engine B4164T, B4164T2, B4164T3 only
- Volvo S80 (2007–)2010Engine B4204T6 only
- Volvo S80 (2007–)2011Engine B4164T, B4204T6, B4204T7 only
- Volvo S80 (2007–)2012–2014Engine B4164T, B4164T2, B4204T6, B4204T7 only
- Volvo S80 (2007–)2015Engine B4164T only
- Volvo V40 (2013–)2013Engine B4164T, B4164T3 only
- Volvo V40 (2013–)2014–2015Engine B4164T, B4164T3, B4164T4 only
- Volvo V40 Cross Country (2013–)2013–2015Engine B4164T only
- Volvo V60 (2011–)2011Engine B4164T, B4164T3, B4204T6, B4204T7 only
- Volvo V60 (2011–)2012–2014Engine B4164T, B4164T2, B4164T3, B4204T7 only
- Volvo V60 (2011–)2015Engine B4164T, B4164T2, B4164T3 only
- Volvo V70 (2008–)2010Engine B4204T6 only
- Volvo V70 (2008–)2011Engine B4164T, B4204T6, B4204T7 only
- Volvo V70 (2008–)2012–2014Engine B4164T, B4164T2, B4204T7 only
- Volvo V70 (2008–)2015Engine B4164T, B4164T2 only
- Volvo XC60 (2009–)2010Engine B4204T6 only
- Volvo XC60 (2009–)2011–2012Engine B4204T6, B4204T7 only
- Volvo XC60 (2009–)2013–2015Engine B4204T7 only
What does this fault code mean?
The engine control module monitors the exhaust camshaft position and has found that it does not reach the commanded position fast enough. The code is a mechanical fault where the commanded position cannot be reached, and camshaft control is switched off. The fault can only be set when the engine is running and camshaft control is active.
Possible causes
- Low engine oil pressure
- Poor quality engine oil
- Sticking exhaust camshaft control valve
- Mechanical fault in the VVT unit
What you can do
- 1Check the fuse for the supply voltage to the exhaust camshaft control valve
- 2Check the engine oil level on the dipstick and that the oil is clean and of the right quality
- 3If you have a diagnostic tool: activate exhaust camshaft control and see whether it responds
- 4If the oil is in order but the fault remains: have a workshop clean the control valve, or replace it if that does not help
- 5If the fault returns after this: have a workshop check the VVT unit
Symptoms you may notice4
- Check engine lamp lit or behaving abnormally
- Engine is hard to start and cranks slowly
- The car lacks power
- Engine hesitates or runs jerkily on acceleration and at steady speed
What the fault can affect1
- Camshaft control is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.