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 MANUALSVOLVO2004V70 L5-2.4L VIN 64 B5244S6REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSCEM CODES (CENTRAL ELECTRONIC MODULE)CEM-8F21PERMANENT FAULTDIAGNOSTIC TROUBLE CODE (DTC) INFORMATION
2004 Volvo V70 L5-2.4L VIN 64 B5244S6
Diagnostic Trouble Code (DTC) Information
2004 Volvo V70 L5-2.4L VIN 64 B5244S6SECTION Diagnostic Trouble Code (DTC) Information
Diagnostic trouble code information
Condition
If windscreen wiper is in its rest position (home position) but wiper switch is in an activated position (that is, one of the positions for full/half-speed, intermittent or single sweep wipe), diagnostic trouble code CEM 8F21 is displayed.
Substitute value
Only low wiper speed works.
Possible source
- Short circuit to voltage supply or open circuit on switch which indicates operation/ rest position
- Defective windscreen wiper lever
- Defective fuse 11C/22.
Fault symptom[s]
- Wiper only works on lowest speed
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.