VOLVO
ECM-918A - Engine control module (ECM). Internal fault. Intermittent fault
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, B6294S2, B6294T only
- Volvo S80 (1999–2006)2003Engine B5204T5, B5234T7, B5244T3, B5254T2, B6294S2, B6294T only
- Volvo S80 (1999–2006)2004Engine B5204T5, B5234T7, B5254T2, B6294S2, 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 code indicates an intermittent internal fault in the engine control module (ECM). This means the fault was registered at an earlier time but is no longer present. The fault is therefore not present at the moment, and how often the code returns decides what should be done.
Possible causes
- Defective engine control module
What you can do
- 1Read off the fault codes and note whether this code is still there after a test drive or has disappeared
- 2If you have a diagnostic tool: read the frozen values and counters to see when the fault was registered and how often it has occurred
- 3Erase the fault code and test drive. If it returns, have a workshop check the engine control module, as it may then be defective
Symptoms you may notice1
- No noticeable symptoms for the driver
What the fault can affect1
- The engine control module does not use the signal from position sensor 1 in the throttle unit
General guidance for car owners. Diagnosis on the car can point to a different cause.