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 V70 Base, 2.4 61, StandardFACTORY OEM SERVICE PROCEDURE
Central Electronic Module (CEM) Diagnostic Trouble Codes - 6 Of 12
- CEM-5F43: Power Supply, Missing (B5244S6; B5254T2; 2003-2004)
- CEM-5F43: Power Supply, Missing (B5244T3; 2001-2003)
- CEM-5F46: Glow Plug, Signal Faulty (B5234T3; B5244S; 2001-2004)
- CEM-5F46: Glow Plug, Signal Faulty (B5244S6; B5254T2; 2003-2004)
- CEM-5F46: Glow Plug, Signal Faulty (B5244T3; 2001-2003)
- CEM-5F46: Glow Plugs, Faulty Signal (2005-2007)
- CEM-5F47: Control Module Power Supply, Signal Too High (2005-2007)
- CEM-5F47: Control Unit Power Supply, Signal Too High (B5234T3; B5244S; 2001-2004)
- CEM-5F47: Control Unit Power Supply, Signal Too High (B5244S6; B5254T2; 2003-2004)
- CEM-5F47: Control Unit Power Supply, Signal Too High (B5244T3; 2001-2003)
- CEM-5F4C: Power Supply, Signal Too Low (2005-2007)
- CEM-5F4C: UNDERVOLTAGE, Signal Too Low (B5234T3; B5244S; 2001-2004)
- CEM-5F4C: UNDERVOLTAGE, Signal Too Low (B5244S6; B5254T2; 2003-2004)
- CEM-5F4C: UNDERVOLTAGE, Signal Too Low (B5244T3; 2001-2003)
- CEM-5F4D: Diagnostic System, Too Long (B5234T3; B5244S; 2001-2004)
- CEM-5F4D: Diagnostic System, Too Long (B5244S6; B5254T2; 2003-2004)
- CEM-5F4D: Diagnostic System, Too Long (B5244T3; 2001-2003)
- CEM-5F4D: On-Board Diagnostic (OBD) System, Too Long Time (2005-2007)
- CEM-5F4F: Start Attempt, Too Many Unsuccessful Attempts (2005-2007)
- CEM-5F4F: Start Attempt, Too Many Unsuccessful Attempts (B5234T3; B5244S; 2001-2004)
- CEM-5F4F: Start Attempt, Too Many Unsuccessful Attempts (B5244T3; 2001-2003)
- CEM-5F4F: Start Attempt, Too Many Unsuccessful Attempts (B5254T2; 2003-2004)
- CEM-5F4F: Start Attempt, Too Many Unsuccessful Attempts (B5254T4; 2004)
- CEM-5F50: Overheat Protection Thermostat, Signal Too High (2005-2007)
- CEM-5F50: Overheat Thermostat, Signal Too High (B5234T3; B5244S; 2001-2004)
- CEM-5F50: Overheat Thermostat, Signal Too High (B5244S6; B5254T2; 2003-2004)
- CEM-5F50: Overheat Thermostat, Signal Too High (B5244T3; 2001-2003)
- CEM-6A01: Rear Left Door Unlocked, Signal Too High, Intermittent Fault (2001-2004)
- CEM-6A01: Rear Left Door Unlocked, Signal Too High, Permanent Fault (2001-2004)
- CEM-6A02: Rear Right Door Unlocked, Signal Too High, Intermittent Fault (2001-2004)
- CEM-6A02: Rear Right Door Unlocked, Signal Too High, Permanent Fault (2001-2004)
- CEM-6A03: Rear Left Door Locked, Signal Too Low, Intermittent Fault (2001-2004)
- CEM-6A03: Rear Left Door Locked, Signal Too Low, Permanent Fault (2001-2004)
- CEM-6A04: Rear Right Door Locked, Signal Too Low, Intermittent Fault (2001-2004)
- CEM-6A04: Rear Right Door Locked, Signal Too Low, Permanent Fault (2001-2004)
- Description Of Parameters
- Notes
- Failed start attempts, value
- Overheating incidents, value
- Successful start attempts, value
- Coolant temperature, value
- Battery voltage, value
- Heater run time, value
- Additional heater status, value
- Actual combustion fan speed, value
- Derived combustion fan speed, value
- Degree of modulation of combustion fan, value
- Fuel pump frequency, value
- Degree of modulation of Glow plug, value
- Flame monitor, value
- Extended X-supply, status
- Supply voltage to components, status
- Glow plug, status
- Water pump, status
- Fuel level, status
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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