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Volvo
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2000
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S70 AWD
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Self-Diagnostics - Turbo
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Diagnostic Tests
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P0506, P0507/ECM-990A: Control Module, Internal Fault
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Fault Conditions
Fault Conditions
ECM-990A is stored ECM if idle speed deviates from tolerance.