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Home >> Chevrolet >> 2008 >> Optra5 LT, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.0L (Diesel) >> Diagnostic Information and Procedures >> DTC P1663 >> Circuit/System Verification
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Circuit/System Verification

Ignition ON, command the lamp ON and OFF with a scan tool. The lamp should turn ON and OFF as commanded.

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