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 MANUALSVOLVO2007XC90 AWD L6-3.2L VIN 98 B6324SREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSDEM CODES (DIFFERENTIAL ELECTRONIC MODULE)DEM-000BDIAGNOSTIC TROUBLE CODE (DTC) INFORMATION
2007 Volvo XC90 AWD L6-3.2L VIN 98 B6324S
Diagnostic Trouble Code (DTC) Information
2007 Volvo XC90 AWD L6-3.2L VIN 98 B6324SSECTION Diagnostic Trouble Code (DTC) Information
Diagnostic trouble code (DTC) information DEM-000B
Condition
Differential Electronic Module (DEM) calculates an expected oil pressure increase in the AOC-unit (the mechanical clutch) during driving. The control module checks how reasonable the oil pressure change is by comparing the calculated value with the signal from the oil pressure sensor.
If the signal deviates too much from the expected value the control module interprets this as a malfunction, and the diagnostic trouble code is generated.
The diagnostic trouble code (DTC) can be diagnosed when driving.
Substitute value
- Four wheel drive is disengaged.
Possible source
- Damaged temperature sensor.
- Damaged AOC unit (mechanic clutch).
- Oil leakage.
- Damaged Differential Electronic Module (DEM).
Fault symptom[s]
- Four wheel drive is not functioning.
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.