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.
2004 Volvo XC70FACTORY OEM SERVICE PROCEDURE
Differential Electronic Module (DEM) DTCS
DIFFERENTIAL ELECTRONIC MODULE (DEM) - DTC INDEX
| DTC | Description |
|---|---|
| DEM-0001 | Temperature sensor. Faulty signal (AW50/51 AWD) |
| DEM-0001 | Temperature sensor. Faulty signal (M58) |
| DEM-0002 | Pressure sensor. Faulty signal (AW50/51 AWD) |
| DEM-0002 | Pressure sensor. Faulty signal (M58) |
| DEM-0003 | System voltage. Faulty voltage (AW50/51 AWD) |
| DEM-0003 | System voltage. Faulty voltage (M58) |
| DEM-0005 | Control valve. Faulty signal (AW50/51 AWD) |
| DEM-0005 | Control valve. Faulty signal (M58) |
| DEM-0006 | Feed pump. Faulty signal (AW50/51 AWD) |
| DEM-0006 | Feed pump. Faulty signal (M58) |
| DEM-0007 | Hydraulic pressure. Incorrect value (AW50/51 AWD) |
| DEM-0007 | Hydraulic pressure. Incorrect value (M58) |
| DEM-0008 | Control module. Internal fault (AW50/51 AWD) |
| DEM-0008 | Control module. Internal fault (M58) |
| DEM-0009 | Control module. Internal fault (AW50/51 AWD) |
| DEM-0009 | Control module. Internal fault (M58) |
| DEM-000A | Power supply. Incorrect value (AW50/51 AWD) |
| DEM-000A | Power supply. Incorrect value (M58) |
| DEM-000B | Oil pressure. Incorrect value (AW50/51 AWD) |
| DEM-000B | Oil pressure. Incorrect value (M58) |
| DEM-E000 | Control module communication. Faulty communication (AW50/51 AWD) |
| DEM-E000 | Control module communication. Faulty communication (M58) |
| DEM-E003 | Configuration fault. Faulty configuration (AW50/51 AWD) |
| DEM-E003 | Configuration fault. Faulty configuration (M58) |
Factory Service Tools
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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.
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