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-100A
Condition
The engine control module (ECM) compares the filtered signal from the intake manifold pressure sensor with the signal from the atmospheric pressure sensor in the engine control module (ECM). The diagnostic trouble code (DTC) is stored if the control module registers that the deviation is greater than 70 hPa.
The diagnostic trouble code (DTC) can be diagnosed 15 seconds after the ignition is switched on.
Substitute value
If the pressure sensor for the intake manifold is OK, a filtered value from the sensor is used. Otherwise the value is set at 1,013 hPa (corresponding to sea level).
Possible source
- Damaged manifold absolute pressure (MAP) sensor
- Damaged engine control module (ECM).
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.