VOLVO
ECM-350D - Ignition coil cylinder 1, signal. Signal too low
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (13)
- Volvo S60 (2001–2009)2005–2006Engine B5204T5, B5244T4, B5244T5, B5254T2, B5254T4 only
- Volvo S60 (2001–2009)2007Engine B5204T5, B5244T5, B5254T2, B5254T4 only
- Volvo S60 (2001–2009)2008–2009Engine B5204T5, B5244T5, B5254T2 only
- Volvo S80 (1999–2006)2005–2006Engine B5204T5, B5244T4, B5254T2 only
- Volvo V70 (2000–2008)2005Engine B5204T5, B5244T4, B5244T5, B5254T2, B5254T4 only
- Volvo V70 (2000–2008)2006–2007Engine B5204T5, B5244T5, B5254T2, B5254T4 only
- Volvo V70 (2000–2008)2008Engine B5254T2 only
- Volvo V70 XC / XC70 (2001–2007)2005All engines except: D5244T
- Volvo V70 XC / XC70 (2001–2007)2006Engine B5244T4, B5254T2 only
- Volvo V70 XC / XC70 (2001–2007)2007Engine B5254T2 only
- Volvo XC90 (2003–)2005–2012Engine B5254T2 only
- Volvo XC90 (2003–)2013–2014Engine B5254T9 only
- Volvo XC90 (2003–)2015
What does this fault code mean?
The control module checks the signal wire to ignition coil 1 and sets the code when the signal is too low. The code identifies ignition coil 1 and therefore concerns the signal to that coil.
Possible causes
- Signal wire shorted to ground
- Damaged ignition coil
What you can do
- 1Clear the code and road test the car to see whether it returns
- 2Check that the connector at ignition coil 1 is fully seated and free from oxidation
- 3Look for chafing on the wire to ignition coil 1 where it may rest against the body
- 4Use a multimeter to check that the wire has no contact with ground
- 5If the fault remains, have a workshop check the ignition coil with diagnostic equipment
Symptoms you may notice2
- Malfunction indicator (emissions lamp) is lit
- Cylinder 1 is not igniting reliably
General guidance for car owners. Diagnosis on the car can point to a different cause.