VOLVO
ECM-92CD - Electronic throttle unit. Signal too low
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
9 modelsC30 (2007–2013), C70 (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 (23)
- Volvo C30 (2007–2013)2007Engine B5254T3 only
- Volvo C30 (2007–2013)2008–2013Engine B5254T7 only
- Volvo C70 (2006–2013)2006–2007Engine B5254T3 only
- Volvo C70 (2006–2013)2008–2013Engine B5254T7 only
- Volvo S40 (2004–2013)2005–2007Engine B5254T3 only
- Volvo S40 (2004–2013)2008Engine B5254T3, B5254T7 only
- Volvo S40 (2004–2013)2009–2012Engine B5254T7 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)2005–2007Engine B5254T3 only
- Volvo V50 (2004–2013)2008–2012Engine B5254T7 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 titled signal too low, it is stored when the ECM, while adapting the throttle unit, finds that the basic conditions for adaptation were not met. Other stored fault codes may be what stops the adaptation, so they should be remedied first. The code therefore concerns the conditions for adaptation rather than the signal itself.
Possible causes
- The adaptation was attempted in the wrong ignition and engine state, where the engine must be off
- The accelerator pedal was not fully released during the adaptation
- The car was not standing still during the adaptation
- The throttle sticks or is blocked by oil film or dust
- Contact resistance or oxidation between the ECM and the throttle unit
- A damaged throttle unit
What you can do
- 1Read the fault codes and deal first with any that are present, as they can stop the adaptation from being carried out
- 2Adaptation requires the engine off, the accelerator pedal released and the car stationary. If any of these was not met, that may be the reason
- 3Check the connectors between the ECM and the throttle unit: are they secure, and is there oxidation or corrosion
- 4Check that the throttle is not blocked by any object and not sticking. Clean as needed
- 5If you have a diagnostic tool: check in the parameters whether the adaptation of the throttle unit went through, meaning it shows OK. The adaptation itself is carried out by a workshop
- 6If the fault remains, the throttle unit may be damaged. A new unit must be adapted, which a workshop does
Symptoms you may notice1
- Poorer engine performance
What the fault can affect3
- The adaptation is cancelled
- The ECM cuts power to the throttle motor, and the throttle goes to its return position
- Only if a new ECM has been fitted to the car, one that has never adapted the throttle unit before, can the ECM use a reversible fuel shut-off
General guidance for car owners. Diagnosis on the car can point to a different cause.