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-431A
Condition
The engine control module (ECM) checks the function of the pump by measuring the current through the leak diagnostic pump.
If the engine control module (ECM) registers that the current curve is uneven, it interprets this as an incorrect reference leak in the pump. The diagnostic trouble code (DTC) is then stored.
The diagnostic trouble code (DTC) can be diagnosed when the leak diagnostic system is run.
Substitute value
- The leak diagnostic is cancelled.
Possible source
- Incorrect control of the heating element (fault detected in the central electronic module (CEM))
- Dirt or damp in the pump
- Damaged leak diagnostic pump.
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.