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P0158-O2 SENSOR 2/2 CIRCUIT HIGH (CONTINUED) 4. O2 SENSOR Turn the ignition off. Connect the C2 PCM harness connector. Connect a jumper wire between the (K243) O2 2/2 Signal circuit and Ignition on, engine not running. With a scan tool, monitor the 2/2 O2 Sensor voltage. Is the voltage between 2.3 and 2.7 volts with the jumper wire Yes >> Replace the O2 Sensor. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 5 NOTE: Remove the jumper wire before continuing. 5. (K243) O2 2/2 SIGNAL CIRCUIT OPEN Turn the ignition off. Disconnect the C1 and C2 PCM harness connectors. CAUTION: Do not probe the PCM harness connectors. Probing Is the resistance below 5.0 ohms? Yes >> Go To 6 No >> Repair the open in the (K243) O2 2/2 Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer 9 - 218 ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L DR/DH |