VOLVO
ECM-1300 - Mass air flow (MAF) sensor. Signal too low. Intermittent fault
System
Engine Control Module (ECM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
7 modelsC70 Cabriolet (1998–2005), C70 Coupé (1998–2002), S60 (2001–2009), S70 (1997–2000), S80 (1999–2006), V70 (1997–2000), V70 (2000–2008)
Show models by year and engine (14)
- Volvo C70 Cabriolet (1998–2005)2000Engine B5244S only
- Volvo C70 Coupé (1998–2002)1999Engine B5254S DENSO only
- Volvo C70 Coupé (1998–2002)2000Engine B5244S only
- Volvo S60 (2001–2009)2001Engine B5244S, B5244S2 only
- Volvo S60 (2001–2009)2002Engine B5244S, B5244S2, B5244SG, B5244SG2 only
- Volvo S70 (1997–2000)1999Engine B5254S DENSO only
- Volvo S70 (1997–2000)2000Engine B5244S, B5244S2, B5244SG, B5244SG2 only
- Volvo S80 (1999–2006)1999–2000Engine B5244S, B5244S2 only
- Volvo S80 (1999–2006)2001Engine B5244S, B5244S2, B5244SG only
- Volvo S80 (1999–2006)2002Engine B5244S, B5244S2, B5244SG, B5244SG2 only
- Volvo V70 (1997–2000)1999Engine B5254S DENSO only
- Volvo V70 (1997–2000)2000Engine B5244S, B5244S2, B5244SG, B5244SG2 only
- Volvo V70 (2000–2008)2001Engine B5244S, B5244S2, B5244SG only
- Volvo V70 (2000–2008)2002Engine B5244S, B5244S2, B5244SG, B5244SG2 only
What does this fault code mean?
The fault is intermittent, meaning it has occurred but does not necessarily remain present right now. The engine control module (ECM) monitors the MAF sensor circuit, and the fault is set when the circuit is shorted to ground or voltage, or when it has an open circuit.
Possible causes
- Signal wire shorted to voltage
- Damaged MAF sensor
- Signal wire shorted to ground
- Open circuit in the signal wire
What you can do
- 1Read the fault code, clear it and test drive to see whether it returns
- 2Move and flex the MAF wiring with the ignition on and see whether the fault code or the signal changes
- 3Check that the MAF sensor and control module connectors are free from contact resistance and oxidation
- 4Check the harness for chafing, pinch damage and loose clips
- 5With a multimeter, check that the signal wire is not shorted to ground or voltage and has no open circuit
- 6If the wiring and connectors look fine: have a workshop with diagnostic equipment check the MAF sensor
Symptoms you may notice1
- Engine warning lamp comes on
What the fault can affect1
- The engine control uses a value calculated from engine speed and intake manifold pressure
General guidance for car owners. Diagnosis on the car can point to a different cause.