VOLVO
ECM-P011121 - Intake Air Temperature Sensor 1 Circuit Range/Performance (Bank 1). General Signal Failures. Signal too low
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
8 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (8)
- Volvo S60 (2011–)2014–2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5 only
- Volvo S80 (2007–)2014–2015Engine B4204T11, B4204T12, B4204T15, D4204T5 only
- Volvo V40 (2013–)2015Engine B4204T11, D4204T14 only
- Volvo V40 Cross Country (2013–)2015Engine B4204T11, D4204T14 only
- Volvo V60 (2011–)2014–2015Engine B4204T11, B4204T12, B4204T15, B4204T9, D4204T5 only
- Volvo V70 (2008–)2014–2015Engine B4204T11, D4204T5 only
- Volvo XC60 (2009–)2014–2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5 only
- Volvo XC70 (2008–)2014–2015Engine B4204T11, D4204T5 only
What does this fault code mean?
The ECM weighs the mass air flow sensor temperature reading against coolant, outside, boost and oil temperature values. Here the air temperature is too low compared with those values, and the code is stored when the difference is too large.
Possible causes
- Contact resistance in the connector terminal
- Mass air flow sensor with the air temperature sensor inside is damaged
What you can do
- 1Read and note the code, clear it and road test to see whether it returns
- 2Start the engine and, with diagnostic equipment, check that the air temperature in live data is reasonable; if it is not, the fault is present
- 3Check the mass air flow sensor connector for contact resistance and oxidation
- 4If the fault remains, have a workshop check the mass air flow sensor
Symptoms you may notice1
- Engine warning lamp (check engine) lit or behaving abnormally
What the fault can affect1
- The outside air temperature from the sensor in the rear-view mirror is used instead
General guidance for car owners. Diagnosis on the car can point to a different cause.