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On Board Diagnosis Logic

WARNING: This page is about a different car, the 2005 Infiniti FX45. However, it is still accessible from the selected car via links, so may be relevant.

The MIL will not light up for this diagnosis. 

NOTE: If DTC P0550 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229. Refer to DTC P1229 SENSOR POWER SUPPLY 
Fig 1: DTC Detecting Condition And Possible Cause Chart
G02361871Courtesy of NISSAN MOTOR CO., U.S.A.
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