On Board Diagnosis Logic

The MIL will not light up for this diagnosis.

NOTE: If DTC P1550 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229. Refer to DTC P1229 SENSOR POWER SUPPLY .

Fig 1: DTC P1550 Condition/Possible Cause Diagnostic Chart

Courtesy of NISSAN MOTOR CO., U.S.A.