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, see CLEARING DIAGNOSTIC TROUBLE CODES for DTC P0172, see DTC P0172: FUEL INJECTION SYSTEM TOO RICH - BANK 1 OR DTC P0175: FUEL INJECTION SYSTEM TOO RICH - BANK 2 , for heated oxygen sensor 1 heater component inspection, see COMPONENT INSPECTION under DTC P0031, DTC P0032, DTC P0051 OR DTC P0052: HO2S1 HEATER, for component inspection, see COMPONENT INSPECTION and for intermittents, see INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.

For diagnostic procedure, see Fig 1 - Fig 3 .

Fig 1: Identifying Diagnostic Procedure For DTC P1144: HO2S1 (Steps 1-2 Of 7 - 2.5L)

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

Fig 2: Identifying Diagnostic Procedure For DTC P1144: HO2S1 (Steps 3-5 Of 7 - 2.5L)

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

Fig 3: Identifying Diagnostic Procedure For DTC P1144: HO2S1 (Steps 6-7 Of 7 - 2.5L)

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