VOLVO
ECM-210D - Long-term fuel trim, bank 1. 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 (10)
- Volvo S60 (2001–2009)2005–2006Engine B5204T5, B5244T4, B5244T5, B5254T2, B5254T4 only
- Volvo S80 (1999–2006)2005–2006Engine B5204T5, B5244T4, B5254T2, B6294S2, B6294T only
- Volvo V70 (2000–2008)2005Engine B5204T5, B5244T4, B5244T5, B5254T2, B5254T4 only
- Volvo V70 (2000–2008)2006Engine B5204T5, B5244T5, B5254T2, B5254T4 only
- Volvo V70 XC / XC70 (2001–2007)2005All engines except: D5244T
- Volvo V70 XC / XC70 (2001–2007)2006Engine B5244T4, B5254T2 only
- Volvo XC90 (2003–)2005–2006Engine B5254T2, B6294T only
- Volvo XC90 (2003–)2007–2012Engine B5254T2 only
- Volvo XC90 (2003–)2013–2014Engine B5254T9 only
- Volvo XC90 (2003–)2015
What does this fault code mean?
The engine control module (ECM) adjusts the fuel mixture using the bank 1 oxygen sensor. When the adjustment sits at its lower limit under higher load and can no longer keep up, the code is set. The fault can have several causes, including high fuel pressure, leaking injectors, or oil that is contaminated or too high in level.
Possible causes
- High fuel pressure
- Leaking injectors
- Damaged mass air flow (MAF) sensor
- Contaminated engine oil
- Oil level too high
- Damaged heated oxygen sensor (HO2S) on bank 1
What you can do
- 1Read and clear the fault code and check whether it returns
- 2Check the oil level against the dipstick markings, and whether the oil looks contaminated or diluted
- 3Check the intake and exhaust systems for leaks
- 4If you have a diagnostic tool, read the lambda integrator in live data at idle and check whether it stays steady
- 5Have a workshop check the fuel pressure and the mass air flow sensor if the fault remains
Symptoms you may notice1
- No noticeable symptoms for the driver
General guidance for car owners. Diagnosis on the car can point to a different cause.