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.
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HOMESERVICE MANUALSVOLVO2003V70 2.4 L5-2.4L VIN 61 B5244SREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSECM CODES (ENGINE CONTROL MODULE)ECM-405ADIAGNOSTIC TROUBLE CODE (DTC) INFORMATION
2003 Volvo V70 2.4 L5-2.4L VIN 61 B5244S
Diagnostic Trouble Code (DTC) Information
2003 Volvo V70 2.4 L5-2.4L VIN 61 B5244SSECTION Diagnostic Trouble Code (DTC) Information
Diagnostic trouble code (DTC) information
Condition
The rear electronic module transmits information to the central electronic module (CEM) via the control area network (CAN) about the fuel level and the fault status of the fuel level sensor. The central electronic module (CEM) transmits this information to the engine control module (ECM).
Diagnostic trouble code (DTC) REM-4A31 or REM-4A35 is stored in the rear electronic module if the rear electronic module has registered a faulty signal from the fuel level sensor. Diagnostic trouble code (DTC) ECM-405A is also stored in the engine control module (ECM) (faulty signal).
The engine control module (ECM) compares the engine fuel consumption with fuel level in the fuel tank. The rear electronic module registers the fuel level in the fuel tank. Diagnostic trouble code (DTC) ECM-405A is stored in the engine control module (ECM) (faulty signal) if the engine control module (ECM) registers that the fuel consumption is outside the permitted range in comparison to how much the fuel level in the fuel tank is falling.
Substitute value
None.
Possible source
Faulty signal:
- defective fuel level sensor.
Fault symptom[s]
None.
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.