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DTC P0139, P0159 HO2S2 EC-291 C D E F G H I J K L M A EC 2007 Pathfinder DTC P0139, P0159 HO2S2 PFP:226A0 Component Description UBS00K71 The heated oxygen sensor 2, after three way catalyst (manifold), CONSULT-II Reference Value in Data Monitor Mode UBS00K72 Specification data are reference values. On Board Diagnosis Logic UBS00K73 The heated oxygen sensor 2 has a much longer switching time SEF327R MONITOR ITEM CONDITION SPECIFICATION HO2S2 (B1) ● Revving engine from idle to 3,000 rpm quickly after the following condi- – Engine: After warming up – Keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at 0 - 0.3V ←→ Approx. 0.6 - 1.0V HO2S2 MNTR (B1) LEAN ←→ RICH SEF302U DTC No. Trouble diagnosis name DTC detecting condition Possible cause P0139 Heated oxygen sensor It takes more time for the sensor to respond ● Harness or connectors ● Heated oxygen sensor 2 ● Fuel pressure ● Fuel injector ● Intake air leaks P0159 |