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6E–141 ENGINE DRIVEABILITY AND EMISSIONS DTC P0131 –HO2S Circuit Low Voltage Bank 1 Sensor 1 (Cont'd) Step No Yes Value(s) Action 8 1. Ignition “OFF.” disconnected. 3. Ignition “ON.” Does the Tech 2 indicate Bank 1 HO2S 1 voltage 425-475 mV Refer to Diagnostic Aids Go to Step 9 9 Replace the PCM. IMPORTANT: The replacement PCM must be UBS 98model year Immobilizer Workshop Manual. Is the action complete? — Verify repair — |