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 MANUALSVOLVO2003V70 2.4 L5-2.4L VIN 61 B5244SREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSECM CODES (ENGINE CONTROL MODULE)ECM-130AFAULTY SIGNAL
2003 Volvo V70 2.4 L5-2.4L VIN 61 B5244S
Faulty Signal
2003 Volvo V70 2.4 L5-2.4L VIN 61 B5244SSECTION Faulty Signal
Faulty signal
Checking the status
- Start the engine.
Check whether the fault is permanent or intermittent by reading off the signal from the mass air flow (MAF) sensor.
Check that the signal is between 0.5 - 4.5 V.
The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
Continue - Checking the connector
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Checking the connector
Check the connector and terminals for the mass air flow (MAF) sensor. Check for contact resistance. Check for oxidation.
Remedy as necessary.
Other information
- Mass air flow (MAF) sensor, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals
Continue - Checking the intake system
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Checking the intake system
Check the intake system for leaks and damage.
Check the intake system for blockages (e.g. contaminants in the throttle).
Remedy as necessary.
Other information
- Air leakage in the intake system, checking Air Leaks in the Intake System, Checking
- Mass air flow (MAF) sensor, replacing Service and Repair
Continue - Verification
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Verification
Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reconnect connectors, reinstall components.
- Start the engine and let it idle.
- Read off the mass air flow (MAF) sensor signal.
The mass air flow (MAF) sensor signal should be approximately 1.5-1.8V at idling speed.
Is the mass air flow (MAF) sensor signal OK?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - Fault Found
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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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FAULT-TRACING FAILED - FAULT-TRACING FAILED
Attempt New Test - Checking the status
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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.