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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 111 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1491: Vacuum Cut Valve Bypass Valve >> Diagnostic Procedure

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: For component inspection, see COMPONENT INSPECTION , for EVAP control system pressure sensor component inspection, see COMPONENT INSPECTION (2.5L)  or COMPONENT INSPECTION (3.5L)  under DTC P0452: EVAP CONTROL SYSTEM PRESSURE SENSOR, for EVAP canister vent control valve component inspection, see COMPONENT INSPECTION  under DTC P0447: EVAP CANISTER VENT CONTROL VALVE 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 P1491: Vacuum Cut Valve Bypass Valve (Steps 1-2 Of 15)
G00266141Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Identifying Diagnostic Procedure For DTC P1491: Vacuum Cut Valve Bypass Valve (Steps 3-7 Of 15)
G00266142Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 3: Identifying Diagnostic Procedure For DTC P1491: Vacuum Cut Valve Bypass Valve (Steps 8-15 Of 15)
G00266143Courtesy of NISSAN MOTOR CO., U.S.A.
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