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Mazda
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2017
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CX-9 Signature
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Repair and Diagnosis
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Engine Performance
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System
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On-Board Diagnostic - Engine Control System (1 Of 5)
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DTC P0131-00; A/F Sensor Circuit Low Input
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Repeatability Verification Procedure
Repeatability Verification Procedure
Start the engine and leave it idling for 1 min.