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Home >> Nissan-Datsun >> 2004 >> Quest SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System >> DTC P1402: EGR Function >> On Board Diagnosis Logic
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On Board Diagnosis Logic

If the EGR temperature sensor detects EGR flow under the condition that does not call for EGR, a high-flow malfunction is diagnosed.

Fig 1: Identifying On Board Diagnosis Logic
G00775837Courtesy of NISSAN MOTOR CO., U.S.A.