VOLVO
ECM-216C - Long-term fuel trim, bank 1. Signal too high
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?
The engine control module has had to correct the fuel mixture for the bank 1 oxygen sensor so much that the long-term correction has nearly reached its maximum at idle. This points to a clearly deviating mixture, which can come from an air leak in the intake or exhaust, or from a damaged oxygen sensor.
Possible causes
- Intake air leakage
- Air leakage in the exhaust system
- 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 leaks, including the hose to the brake booster and the EVAP valve hoses
- 3Check the exhaust system for leaks at joints and seams
- 4Have a diagnostic tool? Read the mass air flow correction factor with the engine at idle, and check that the value looks plausible and does not deviate sharply
- 5If the fault remains, have a workshop check the bank 1 oxygen sensor and measure the fuel pressure
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.