VOLVO
ECM-212D - 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 (14)
- 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, B6294S2, B6294T 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–)2005–2006Engine 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?
Although the code is named for a signal that is too low, the condition is that the long-term fuel trim for bank 1 has nearly reached its extreme position at lower part load. The mixture then deviates strongly from the target, and the fault can come from leaks, fuel pressure, injectors, the mass air flow sensor or a damaged sensor.
Possible causes
- Intake air leakage
- High fuel pressure
- Leaking fuel injectors
- Damaged mass air flow sensor
- Contaminated engine oil or oil level too high
- Damaged heated oxygen sensor on bank 1
What you can do
- 1Clear the code and road test the car to see whether it returns
- 2Check the intake system for air leakage, for example the hose to the brake booster and the hoses to the EVAP valve
- 3Look for fuel leaks and wet patches under the car
- 4Check the oil level against the min and max marks on the dipstick, and whether the oil looks cloudy or smells of fuel
- 5Have a diagnostic tool? Read the mass air flow sensor value in live data at idle and check that it is steady
- 6If the fault remains, have a workshop measure the fuel pressure and check the injectors and the mass air flow sensor
Symptoms you may notice1
- Fuel consumption is abnormally high
General guidance for car owners. Diagnosis on the car can point to a different cause.