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 S60 RFACTORY OEM SERVICE PROCEDURE
Differential Electronic Module (DEM) DTCS
DIFFERENTIAL ELECTRONIC MODULE (DEM) DTC INDEX
| Volvo Code | Description |
|---|---|
| DEM-0001 | Temperature sensor. Faulty signal (AW50/51 AWD) |
| DEM-0001 | Temperature sensor. Faulty signal (M66 AWD) |
| DEM-0002 | Pressure sensor. Faulty signal (AW50/51 AWD) |
| DEM-0002 | Pressure sensor. Faulty signal (M66 AWD) |
| DEM-0003 | System voltage. Faulty voltage (AW50/51 AWD) |
| DEM-0003 | System voltage. Faulty voltage (M66 AWD) |
| DEM-0005 | Control valve. Faulty signal (AW50/51 AWD) |
| DEM-0005 | Control valve. Faulty signal (M66 AWD) |
| DEM-0006 | Feed pump. Faulty signal (AW50/51 AWD) |
| DEM-0006 | Feed pump. Faulty signal (M66 AWD) |
| DEM-0007 | Hydraulic pressure. Incorrect value (AW50/51 AWD) |
| DEM-0007 | Hydraulic pressure. Incorrect value (M66 AWD) |
| DEM-0008 | Control module. Internal fault (AW50/51 AWD) |
| DEM-0008 | Control module. Internal fault (M66 AWD) |
| DEM-0009 | Control module. Internal fault (AW50/51 AWD) |
| DEM-0009 | Control module. Internal fault (M66 AWD) |
| DEM-000A | Power supply. Incorrect value (AW50/51 AWD) |
| DEM-000A | Power supply. Incorrect value (M66 AWD) |
| DEM-000B | Oil pressure. Incorrect value (AW50/51 AWD) |
| DEM-000B | Oil pressure. Incorrect value (M66 AWD) |
| DEM-E000 | Control module communication. Faulty communication (AW50/51 AWD) |
| DEM-E000 | Control module communication. Faulty communication (M66 AWD) |
| DEM-E003 | Configuration fault. Faulty configuration (AW50/51 AWD) |
| DEM-E003 | Configuration fault. Faulty configuration (M66 AWD) |
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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