Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic Trouble Code (DTC) Information
2004 Volvo V70 L5-2.4L VIN 64 B5244S6SECTION Diagnostic Trouble Code (DTC) Information
Diagnostic trouble code (DTC) information ECM-1300
Condition
The engine control module (ECM) checks the signal from the mass air flow (MAF) sensor.
This diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a short-circuit to ground or supply voltage or an open-circuit in the sensor circuit.
The diagnostic trouble code (DTC) is diagnosed when the ignition is on.
Substitute value
- A value calculated from engine speed (RPM) and pressure in the intake manifold is used.
Possible source
Signal too high
- Short-circuit to supply voltage in the signal cable
- Damaged mass air flow (MAF) sensor.
Signal too low
- Short-circuit to ground in the signal cable
- Open-circuit in the signal cable
- Damaged mass air flow (MAF) sensor.
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.