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 Base, 2.4 61, StandardFACTORY OEM SERVICE PROCEDURE
Central Electronic Module (CEM), Rear Electronic Module (Rem), Upper Electronics Module (UEM) - Diagnostic Trouble Codes - 8 Of 13
- CEM-6C41: Antenna / Light Ring Wire Clock-Signal (ICK). Signal Too High. Intermittent Fault (2001-2004)
- CEM-6C41: Antenna / Light Ring Wire Clock-Signal (ICK). Signal Too High. Permanent Fault (2001-2004)
- CEM-6C41: Antenna / Light Ring-Clock Signal Cable. Signal Too High (2005-2009)
- CEM-6C42: Antenna / Light Ring - Clock Signal Cable. Signal Too Low (2005-2009)
- CEM-6C42: Antenna / Light Ring Wire Clock-Signal (ICK). Signal Too Low. Intermittent Fault (2001-2004)
- CEM-6C42: Antenna / Light Ring Wire Clock-Signal (ICK). Signal Too Low. Permanent Fault (2001-2004)
- CEM-6C43: Antenna / Light Ring - Data Communication Cable. Signal Too High (2005-2009)
- CEM-6C43: Antenna / Light Ring Data Communication (Ids). Signal Too High. Permanent Fault (2001-2004)
- CEM-6C43: Antenna / Light Ring Wire Data Communication (Ids). Signal Too High. Intermittent Fault (2001-2004)
- CEM-6C44: Antenna / Light Ring - Data Communication Cable. Signal Too Low (2005-2009)
- CEM-6C44: Antenna / Light Ring Wire Data Communication (Ids). Signal Too Low. Intermittent Fault (2001-2004)
- CEM-6C44: Antenna / Light Ring Wire Data Communication (Ids). Signal Too Low. Permanent Fault (2001-2004)
- CEM-6C45: Antenna / Light Ring. Communication Fault (2004)
- CEM-6C45: Antenna / Light Ring. Communication Problems (2005-2009)
- CEM-6C46: Antenna / Light Ring. Internal Fault (2005-2009)
- CEM-6C46: Antenna / Light Ring. Internal Fault. Intermittent Fault (2001-2004)
- CEM-6C46: Antenna / Light Ring. Internal Fault. Permanent Fault (2001-2004)
- CEM-6C48: Transponder Type. Faulty Signal (2005-2009)
- CEM-6C48: Transponder Type. Faulty Signal. Intermittent Fault (2001-2004)
- CEM-6C48: Transponder Type. Faulty Signal. Permanent Fault (2001-2004)
- CEM-6C49: Transponder Communication. Faulty Signal (2005-2009)
- CEM-6C49: Transponder Communication. Faulty Signal. Intermittent Fault (2001-2004)
- CEM-6C49: Transponder Communication. Faulty Signal. Permanent Fault (2001-2004)
- CEM-6D01: Relay, Window Lift LR Up. Signal Too High. Intermittent Fault (2001-2004)
- CEM-6D01: Relay, Window Lift LR Up. Signal Too High. Permanent Fault (2001-2004)
- CEM-6D03: Relay, Window Lift LR Up. Signal Too Low. Intermittent Fault (2001-2004)
- CEM-6D03: Relay, Window Lift LR Up. Signal Too Low. Permanent Fault (2001-2004)
- CEM-6D04: Relay, Window Lift LR Down. Signal Too High. Intermittent Fault (2001-2004)
- CEM-6D04: Relay, Window Lift LR Down. Signal Too High. Permanent Fault (2001-2004)
- CEM-6D06: Relay, Window Lift LR Down Signal Too Low. Intermittent Fault (2001-2004)
- CEM-6D06: Relay, Window Lift LR Down. Signal Too Low. Permanent Fault (2001-2004)
- CEM-6D07: Relay, Window Lift RR Up. Signal Too High. Intermittent Fault (2001-2004)
- CEM-6D07: Relay, Window Lift RR Up. Signal Too High. Permanent Fault (2001-2004)
- CEM-6D09: Relay, Window Lift RR Up. Signal Too Low. Intermittent Fault (2001-2004)
- CEM-6D09: Relay, Window Lift RR Up. Signal Too Low. Permanent Fault (2001-2004)
- CEM-6D0A: Relay, Window Lift RR Down. Signal Too High. Intermittent Fault (2001-2004)
- CEM-6D0A: Relay, Window Lift RR Down. Signal Too High. Permanent Fault (2001-2004)
- CEM-6D0C: Relay, Window Lift RR Down. Signal Too Low. Intermittent Fault (2001-2004)
- CEM-6D0C: Relay, Window Lift RR Down. Signal Too Low. Permanent Fault (2001-2004)
- CEM-6D0D: Relay, Child Safety Blocking. Signal Too High. Intermittent Fault (2001-2004)
- CEM-6D0D: Relay, Child Safety Blocking. Signal Too High. Permanent Fault (2001-2004)
- CEM-6D0F: Relay, Child Safety Blocking. Signal Too Low. Intermittent Fault (2001-2004)
- CEM-6D0F: Relay, Child Safety Blocking. Signal Too Low. Permanent Fault (2001-2004)
- CEM-6E01: Switch, Fuel Tank Filler Cover. Faulty Signal (2005-2009)
- CEM-6F01: Cruise Control On/Off Button. Activated Too Long (2005-2009)
- CEM-6F02: Cruise Control Set+ Button. Activated Too Long (2005-2009)
- CEM-6F03: Cruise Control Set- Button. Activated Too Long (2005-2009)
- CEM-6F04: Cruise Control, Resume Button. Activated Too Long (2005-2009)
- CEM-6F05: Cruise Control, Cancel Button. Activated Too Long (2005-2009)
- CEM-6F06: Cruise Control. Faulty Signal (2005-2009)
- CEM-6F07: Cruise Control. Faulty Signal (2005-2009)
- CEM-6F71: Switch, Fuel Tank Filler Cover. Signal Too Low (2002-2004)
- CEM-7A01: Scan- Button. Activated Too Long (2005-2009)
- CEM-7A02: Scan+ Button. Activated Too Long (2005-2009)
- CEM-7A03: Scan- Button. Activated Too Long (2005-2009)
- CEM-7A04: Volume+ Button. Activated Too Long (2005-2009)
- CEM-7A05: Phone Yes Button. Activated Too Long (2005-2009)
- CEM-7A06: Phone No Button. Activated Too Long (2005-2009)
- CEM-7A07: RTI Right Button. Activated Too Long (2005-2009)
- CEM-7A08: RTI Left Button. Activated Too Long (2005-2009)
- CEM-7A09: RTI Down Button. Activated Too Long (2005-2009)
- CEM-7A0A: RTI Up Button. Activated Too Long (2005-2009)
- CEM-7A0B: RTI Back Button. Activated Too Long (2005-2009)
- CEM-7A0C: RTI Enter Button. Activated Too Long (2005-2009)
- CEM-8A01: Invalid Switch Position For Light Switch. Signal Faulty. Intermittent Fault (2001-2004)
- CEM-8A01: Invalid Switch Position For Light Switch. Signal Faulty. Permanent Fault (2001-2004)
- CEM-8A01: Invalid Switch Position For The Light Switch. Faulty Position (2005-2009)
- CEM-8A02: Main Beam Relay. Signal Too High. Intermittent Fault (2001-2004)
- CEM-8A02: Main Beam Relay. Signal Too High. Permanent Fault (2001-2004)
- CEM-8A04: Main Beam Relay. Signal Missing. Intermittent Fault (2001-2004)
- CEM-8A04: Main Beam Relay. Signal Missing. Permanent Fault (2001-2004)
- CEM-8A05: Dipped Headlamp Relay. Signal Too High. Intermittent Fault (2001-2004)
- CEM-8A05: Dipped Headlamp Relay. Signal Too High. Permanent Fault (2001-2004)
- CEM-8A07: Dipped Headlamp Relay. Signal Missing. Intermittent Fault (2001-2004)
- CEM-8A07: Dipped Headlamp Relay. Signal Missing. Permanent Fault (2001-2004)
- CEM-8A08: Extra Lamp Relay. Signal Too High. Intermittent Fault (2001-2004)
- CEM-8A08: Extra Lamp Relay. Signal Too High. Permanent Fault (2001-2004)
- CEM-8A0A: Extra Lamp Relay. Signal Missing. Intermittent Fault (2001-2004)
- CEM-8A0A: Extra Lamp Relay. Signal Missing. Permanent Fault (2001-2004)
- CEM-8A0B: Relay, Daytime Running Lamp. Signal Too High (2002-2004)
- CEM-8A0C: Relay, Day Running Lamp. Signal Missing (2002-2004)
- CEM-8A20: Low Beam Left. Signal Too Low (2005-2009)
- CEM-8A21: Low Beam Right. Signal Too Low (2005-2009)
- CEM-8A30: Daytime Running Lamps, Left. Faulty Signal (2005-2009)
- CEM-8A31: Daytime Running Lamps, Right. Faulty Signal (2005-2009)
- CEM-8A32: High Beam Flash. Activated Too Long (2005-2009)
- CEM-8B01: Parking Lamps. Signal Too Low (2005-2009)
- CEM-8B01: Position Lamp Relay. Signal Too High. Intermittent Fault (2001-2004)
- CEM-8B01: Position Lamp Relay. Signal Too High. Permanent Fault (2001-2004)
- CEM-8B03: Position Lamp Relay. Signal Missing. Intermittent Fault (2001-2004)
- CEM-8B03: Position Lamp Relay. Signal Missing. Permanent Fault (2001-2004)
- CEM-8C11: Front Fog Lamp Switch. Signal Too Low. Intermittent Fault (2001-2004)
- CEM-8C11: Front Fog Lamp Switch. Signal Too Low. Permanent Fault (2001-2004)
- CEM-8C11: Switch, Front Fog Lamps. Activated Too Long (2005-2009)
- CEM-8C12: Rear Fog Switch Activated Too Long (2005-2009)
- CEM-8C12: Rear Fog Lamp Switch. Signal Too Low. Intermittent Fault (2001-2004)
- CEM-8C12: Rear Fog Lamp Switch. Signal Too Low. Permanent Fault (2001-2004)
- CEM-8C13: Front Fog Lamp Relay. Signal Too High. Intermittent Fault (2001-2004)
- CEM-8C13: Front Fog Lamp Relay. Signal Too High. Permanent Fault (2001-2004)
- CEM-8C15: Front Fog Lamp Relay. Signal Missing. Intermittent Fault (2001-2004)
- CEM-8C15: Front Fog Lamp Relay. Signal Missing. Permanent Fault (2001-2004)
- CEM-8D01: Ignition Lock Light And Extra Brake Light. Signal Too Low. Intermittent Fault (2001-2004)
- CEM-8D01: Ignition Lock Light And Extra Brake Light. Signal Too Low. Permanent Fault (2001-2003)
- CEM-8D01: Ignition Switch Lighting And High-Mounted Stop Lamp (Led). Signal Too Low (2004)
- CEM-8D01: Stop Lamps. Signal Too Low (2005-2009)
- CEM-8D02: Stop Lamps. Faulty Signal (2005)
- CEM-8D03: Brake Light Switch Internal Fault (2005-2009)
- CEM-8D04: Internal Fault In Control Module (2005-2009)
- CEM-8E01: Back-Up (Reversing) Lamp Switch. Faulty Signal (2005-2009)
- CEM-8E01: Reversing Light. Signal Too Low. Intermittent Fault (2001-2004)
- CEM-8E01: Reversing Light. Signal Too Low. Permanent Fault (2001-2004)
- CEM-8F01: Warning Flasher And Glove Box Light. Signal Too Low. Intermittent Fault (2001-2004)
- CEM-8F01: Warning Flasher And Glove Box Light. Signal Too Low. Permanent Fault (2001-2004)
- CEM-8F02: Left Direction Indicator. Signal Too Low. Intermittent Fault (2001-2004)
- CEM-8F02: Left Direction Indicator. Signal Too Low. Permanent Fault (2001-2004)
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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