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5. (K141) O2 SENSOR 1/2 SIGNAL CIRCUIT Remove the jump wire. Ignition on, engine not running. With the scan tool, monitor the 1/2 O2 Sensor voltage. Is the voltage above 4.8 volts? Yes >> Go To 6 No >> Check the (K141) O2 Sensor 1/2 Signal circuit for an open or short to voltage. Inspect the O2 Sensor connector and Perform the POWERTRAIN VERIFICATION TEST. (Refer 9 - 720 ENGINE ELECTRICAL DIAGNOSTICS LX |