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.
Central Electronic Module (CEM) Diagnostic Trouble Codes (XC) - 5 Of 7
2007 Volvo XC70SECTION Central Electronic Module (CEM) Diagnostic Trouble Codes (XC) - 5 Of 7
- CEM-5F3B: Water Pump. Signal Too Low (B5254T2; 2003-2004)
- CEM-5F3C: Combustion Fan. Signal Too High (2005-2007)
- CEM-5F3C: Heater Fan. Signal Too High (B5244T3; 2001-02)
- CEM-5F3C: Heater Fan. Signal Too High (B5254T2; 2003-2004)
- CEM-5F3D: Combustion Fan. Signal Too Low (2005-07)
- CEM-5F3D: Heater Fan. Signal Too Low (B5244T3; 2001-2002)
- CEM-5F3D: Heater Fan. Signal Too Low (B5254T2; 2003-04)
- CEM-5F3E: Combustion Fan. Faulty Signal (2005-07)
- CEM-5F3E: Heater Fan. Signal Faulty (B5244T3; 2001-2002)
- CEM-5F3E: Heater Fan. Signal Faulty (B5254T2; 2003-04)
- CEM-5F3F: Fuel Pump (FP). Signal Too High (2005-2007)
- CEM-5F3F: Fuel Pump. Signal Too High (B5244T3; 2001-02)
- CEM-5F3F: Fuel Pump. Signal Too High (B5254T2; 2003-04)
- CEM-5F40: Fuel Pump (FP). Signal Too Low (2005-07)
- CEM-5F40: Fuel Pump. Signal Too Low (B5244T3; 2001-2002)
- CEM-5F40: Fuel Pump. Signal Too Low (B5254T2; 2003-2004)
- CEM-5F41: Overheat Protection Thermostat. Signal Too Low (2005-2007)
- CEM-5F41: Overheat Thermostat. Signal Too Low (B5244T3; 2001-2002)
- CEM-5F42: Power Supply. Faulty (2005-07)
- CEM-5F42: Power Supply. Faulty (B5244T3; 2001-02)
- CEM-5F42: Power Supply. Faulty (B5254T2; 2003-2004)
- CEM-5F43: Power Supply. Missing (2005-2007)
- CEM-5F43: Power Supply. Missing (B5244T3; 2001-2002)
- CEM-5F43: Power Supply. Missing (B5254T2; 2003-04)
- CEM-5F46: Glow Plug. Signal Faulty (B5244T3; 2001-2002)
- CEM-5F46: Glow Plug. Signal Faulty (B5254T2; 2003-04)
- CEM-5F46: Glow Plugs. Faulty Signal (2005-2007)
- CEM-5F47: Control Module Power Supply. Signal Too High (2005-07)
- CEM-5F47: Control Unit Power Supply. Signal Too High (B5244T3; 2001-02)
- CEM-5F47: Control Unit Power Supply. Signal Too High (B5254T2; 2003-04)
- CEM-5F4C: Power Supply. Signal Too Low (2005-2007)
- CEM-5F4C: UNDERVOLTAGE. Signal Too Low (B5244T3; 2001-2002)
- CEM-5F4C: UNDERVOLTAGE. Signal Too Low (B5254T2; 2003-2004)
- CEM-5F4D: Diagnostic System. Too Long (B5244T3; 2001-2002)
- CEM-5F4D: Diagnostic System. Too Long (B5254T2; 2003-2004)
- 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 (B5244T3; 2001-2002)
- CEM-5F4F: Start Attempt. Too Many Unsuccessful Attempts (B5254T2; 2003-2004)
- CEM-5F50: Overheat Protection Thermostat. Signal Too High (2005-2007)
- CEM-5F50: Overheat Thermostat. Signal Too High (B5244T3; 2001-02)
- CEM-5F50: Overheat Thermostat. Signal Too High (B5254T2; 2003-2004)
- 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 (2001-04)
- CEM-6A02: Rear Right Door Unlocked. Signal Too High. Permanent Fault (2001-04)
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.