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P0402

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P0402 OBD-II Trouble Code: Exhaust Gas Recirculation Flow Excessive Detected
P0402 P0402 code definition Exhaust Gas Recirculation Flow Excessive Detected What the P0402 code means P0402 is an OBD-II generic code that the engine control module (ECM) has detected indicating the engine exhaust gas recirculation (EGR) valve is flowing too...

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After 'check engine' light, diagnostic revealed P0171 and P0402
The first code, P0171, is an indication the engine is running lean. This code can indicate anything from clogged air and fuel filters to problems with O2 sensors and mass air flow sensors to intake gaskets. The other code,...

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