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Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: To erase DTC's from memory, see CLEARING DIAGNOSTIC TROUBLE CODES , to perform trouble diagnosis for DTC P0171, see DIAGNOSTIC PROCEDURE (2.5L)  or DIAGNOSTIC PROCEDURE (3.5L)  under DTC P0171 or DTC P0174: FUEL INJECTION SYSTEM FUNCTION, for heated oxygen sensor 1 heater component inspection, see COMPONENT INSPECTION  under DTC P0031, DTC P0032, DTC P0051 OR DTC P0052: HO2S1 HEATER, for heated oxygen sensor 1 component inspection, see COMPONENT INSPECTION  and for intermittents, see INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.

For diagnostic procedure, see Fig 1-Fig 2 .

Fig 1: Identifying Diagnostic Procedure For DTC P1143: HO2S1 (Steps 1-2 Of 6)
G00264578Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Identifying Diagnostic Procedure For DTC P1143: HO2S1 (Steps 3-6 Of 6)
G00264579Courtesy of NISSAN MOTOR CO., U.S.A.
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