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6E–147 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS Diagnostic Trouble Code (DTC) P0131 HO2S Circuit Low Voltage Bank 1 Sensor 1 060R100133 Circuit Description The powertrain control module (PCM) supplies a bias Conditions for Setting the DTC D No related DTCs. D Vehicle is operating in “closed loop”. D Engine coolant temperature is above 60 ° C (140 ° F). D Bank 1 HO2S 1 signal voltage remains below 30 mV Action Taken When the DTC Sets D The PCM will ON the MIL after second trip with D The PCM will store conditions which were present D “Open loop” fuel control will be in effect. Conditions for Clearing the MIL/DTC D The PCM will turn the MIL “OFF” on the third D A history DTC P0131 will clear after 40 consecutive D DTC P0131 can be cleared by using the Tech 2 “Clear Diagnostic Aids Check for the following conditions: D Heated oxygen sensor wiring – The sensor pigtail may D Poor PCM to engine block grounds. D Fuel pressure – The system will go lean if pressure is Fuel System Diagnosis. D Lean injector(s) – Perform “Injector Balance Test”. D Vacuum leaks – Check for disconnected or damaged |