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Home >> Chevrolet >> 2023 >> Tahoe SSV >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (2 Of 5)) >> Diagnostic Information and Procedures >> DTC P0401, P049B, P04D9, P04DA, P04DD, P04DE, P131F, or P2D1C >> DTC Descriptor

DTC Descriptor

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DTC P0401

Exhaust Gas Recirculation Valve Flow Insufficient

DTC P049B

Exhaust Gas Recirculation Valve 2 Insufficient Flow

DTC P04D9

Closed Loop Exhaust Gas Recirculation Control At Limit - Flow Too Low

DTC P04DA

Closed Loop Exhaust Gas Recirculation Control At Limit - Flow Too High

DTC P131F

Exhaust Gas Recirculation System Performance - Flow Excessive

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