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Chevrolet
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2008
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Optra LS, Standard
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls And Fuel - 2.0L (Diesel)
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Diagnostic Information and Procedures
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DTC P0401 or P0402
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DTC Descriptors
DTC Descriptors
DTC P0401
Exhaust Gas Recirculation (EGR) Flow Insufficient
DTC P0402
Exhaust Gas Recirculation (EGR) Flow Excessive