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DTC P1271, P1281 A/F SENSOR 1 EC-483 C D E F G H I J K L M A EC
2005 Pathfinder DTC P1271, P1281 A/F SENSOR 1 PFP:22693 Component Description UBS00KE2 The air fuel ratio (A/F) sensor is a planar dual-cell limit current sen- = 1, but also in the lean and rich range. Together with its control electronics, the sensor range (0.7 < < air). The exhaust gas components diffuse through the diffusion gap at the An electronic circuit controls the pump current through the oxygen- = 1. Therefore, the air fuel ratio (A/F) sen- sor is able to indicate air/fuel ratio by this pumping of current. In ° C (1,292 - 1,472 ° F). CONSULT-II Reference Value in Data Monitor Mode UBS00KE3 Specification data are reference values. On Board Diagnosis Logic UBS00KE4 To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the air fuel ratio (A/ DTC Confirmation Procedure UBS00KE5 NOTE: WITH CONSULT-II 1. Start engine and warm it up to normal operating temperature. 2. Select “A/F SEN1 (B1)” or “A/F SEN1 (B2)” in “DATA MONITOR” mode with CONSULT-II. SEF579Z SEF580Z MONITOR ITEM CONDITION SPECIFICATION A/F SEN1 (B1) ● Engine: After warming up Maintaining engine speed at Fluctuates around 1.5V DTC No. Trouble diagnosis name DTC detecting condition Possible Cause P1271 Air fuel ratio (A/F) sensor 1 ● The A/F signal computed by ECM from the ● Harness or connectors ● Air fuel ratio (A/F) sensor 1 P1281 |