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 CHARTSECM CODES (ENGINE CONTROL MODULE)ECM-641FFAULTY SIGNAL
2004 Volvo V70 L5-2.4L VIN 64 B5244S6
Faulty Signal
2004 Volvo V70 L5-2.4L VIN 64 B5244S6SECTION Faulty Signal
Faulty signal
Checking the component
Check that the base setting for the toothed belt is correct between the crankshaft and the camshafts. Use the markings on the engine.
Hint: Faults may result from dirt in the camshaft reset valve. Try cleaning the valve.
Try a new camshaft reset valve if the above fault-tracing does not solve the fault.
Remedy as necessary.
Other information:
- To clean the camshaft reset valve, see VVT solenoid, inspection and cleaning VVT Solenoid, Inspection and Cleaning.
Continue - Verification
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Verification
Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the connectors, components etc.
- Start the engine and run it to normal operating temperature.
Note! The engine must be at operating temperature (above 80°C).
Check the actual and desired values when the control starts. This takes approximately 2 minutes.
The actual value must follow the desired value.
Does the actual value follow the desired value?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - Fault Found
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - FAULT-TRACING FAILED
No - Attempt New Test
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Attempt New Test - Checking the component
FAULT-TRACING FAILED - FAULT-TRACING FAILED
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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.