VOLVO
ECM-P001794 - Crankshaft Position - Camshaft Position Correlation - Bank 1 Sensor B. Component Failures. Unexpected operation
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 (20)
- Volvo S60 (2011–)2011Engine B4164T, B4164T3, B4204T6, B4204T7 only
- Volvo S60 (2011–)2012–2014Engine 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 adjusts the camshaft adaptation when a camshaft sits too far ahead of the crankshaft, and the code is set when the adaptation value rises above a certain value. The code is labelled bank 1, sensor B, but the condition concerns the intake camshaft, so both camshafts may need checking.
Possible causes
- Poor quality engine oil
- Incorrectly set camshafts
- Camshaft timing belt has skipped teeth
- Damaged camshaft control valve
- Mechanical fault in the VVT unit
What you can do
- 1Read the code, clear it and road test the car to see whether it returns
- 2Check the engine oil level and quality, and that it is free from contamination
- 3If you have a diagnostic tool: activate camshaft control and see whether the valves respond
- 4Have a workshop check the camshaft basic setting and that the timing belt sits correctly
- 5Have a workshop clean the camshaft control valves, or fit new ones if the fault remains
- 6If the fault returns: have a workshop check the VVT unit
Symptoms you may notice1
- Check engine lamp lit or behaving abnormally
General guidance for car owners. Diagnosis on the car can point to a different cause.