VOLVO
ECM-21E0 - Long-term fuel trim, bank 1. Faulty signal
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
8 modelsC70 (2006–2013), S40 (2004–2013), S60 (2001–2009), S80 (1999–2006), V50 (2004–2013), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (17)
- Volvo C70 (2006–2013)2006Engine B5254T3 only
- Volvo S40 (2004–2013)2005–2006Engine B5254T3 only
- 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 V50 (2004–2013)2005–2006Engine B5254T3 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?
This code is a collective code for fuel adaptation faults on bank 1. It is stored when one of the underlying adaptation codes for bank 1 is present in two consecutive driving cycles, and it is always stored together with one of them. Work through the underlying codes first.
Possible causes
- One of the underlying long-term fuel trim codes is stored in two consecutive driving cycles
What you can do
- 1Read all the long-term fuel trim codes and fix them first
- 2Clear this code only once the underlying codes are fixed, then road test the car to see whether it returns
- 3Have a diagnostic tool? Read the codes and note which adaptation codes are stored alongside this one
Symptoms you may notice1
- The malfunction indicator lamp (MIL) comes on
General guidance for car owners. Diagnosis on the car can point to a different cause.