VOLVO
ECM-210C - 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 (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 air-fuel mixture using the bank 1 oxygen sensor to bring it to lambda 1. If the adjustment has to sit close to its limit at higher load and therefore cannot keep up, the code is set. The cause may be an air leak or low fuel pressure, but a damaged oxygen sensor can also set the code.
Possible causes
- Intake system leak
- Exhaust system leak
- Low fuel pressure
- 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 intake system for air leaks at hoses and connections; leaks can also come from the fuel vapour valve, a secondary-air solenoid or the brake booster
- 3Check the exhaust system for leaks at joints and flanges
- 4If you have a diagnostic tool, read the lambda integrator in live data at idle and under load
- 5Have a workshop measure the fuel pressure if the fault remains after these checks
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.