VOLVO
ECM-1230 - Air mass. Signal too low
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (9)
- 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 V50 (2004–2013)2005–2007Engine B5254T3 only
- Volvo V50 (2004–2013)2008–2012Engine B5254T7 only
What does this fault code mean?
The engine control module compares the measured air quantity with the expected one. If the air quantity is too low and the fuel mixture adjustment is at the same time outside its normal range, the code is set. The cause may be a leak, a blocked intake or poor contact at the air mass sensor.
Possible causes
- Contact resistance or oxidation at the mass air flow connectors
- Air leakage in the intake system
- Blocked intake system
- Damaged mass air flow sensor
What you can do
- 1Check the mass air flow sensor connector for contact resistance and oxidation
- 2Check the hoses between the mass air flow sensor and the throttle unit for leaks and damage
- 3Check that the throttle housing is not contaminated, since dirt can block the air flow
- 4If the fault remains, have a workshop check the mass air flow sensor
Symptoms you may notice2
- The malfunction indicator lamp comes on
- The engine performs worse
What the fault can affect3
- Boost pressure is calculated instead of measured
- Rear oxygen sensor control is switched off
- Misfire detection is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.