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.
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HOMESERVICE MANUALSVOLVO2007XC90 AWD L6-3.2L VIN 98 B6324SREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSCEM CODES (CENTRAL ELECTRONIC MODULE)CEM-1A67
2007 Volvo XC90 AWD L6-3.2L VIN 98 B6324S
CEM-1A67
2007 Volvo XC90 AWD L6-3.2L VIN 98 B6324SSECTION CEM-1A67
Diagnostic trouble code (DTC) information CEM-1A67
Condition
The diagnostic trouble code (DTC) is generated if the central electronic module (CEM) registers that communication with the headlight control module (HCM) is not operating.
The diagnostic trouble code (DTC) can be diagnosed when the ignition has been on for more than 10 seconds.
Note! If CEM-1A6X diagnostic trouble codes (DTCs) are stored, the central electronic module (CEM) must not be replaced as the diagnostic trouble code (DTC) indicates a communication fault in the Control area network!
Substitute value
- None.
Possible source
- Voltage feed to Headlight Control Module (HCM) missing.
- Open circuit on ground cable to Headlight Control Module (HCM)
- Contact resistance in the terminals
- Open circuit on CAN cables to headlight control module (HCM).
- Headlight Control Module (HCM) not intended for this car, e.g., used control module with other hardware/software.
Hint: If several diagnostic trouble codes for communication errors with other control modules in the high-speed network are stored in the Central electronic module (CEM), this indicates some common problem in the CAN-network (see wiring diagram).
Fault symptom[s]
- Active Bi-Xenon light; No Functionality
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.