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DTC P0130 (FO2_V) - Front O2S Circuit Malfunction

  1. Warm engine to normal operating temperature and check CO content of exhaust gas. If CO is less than 2 percent, go to next step. If CO content is greater than 2 percent, check for improper fuel or if engine oil or coolant level is extremely low.
  2. Turn ignition off. Connect SSM. Start and warm engine to normal operating temperature, about 160°F (70°C). Operate engine at 2000-3000 RPM for one minute. Set SSM to function mode F12 to monitor front O2S maximum output signal. If the voltage difference is 0.1 volt or less between the value of the maximum and minimum output, go to next step. If the voltage difference is greater than 0.1 volt, replace front O2S.
  3. Turn ignition off. Disconnect front O2S harness connector. Turn ignition on. Check voltage between front O2S connector terminal No. 4 and chassis ground. If voltage is less than 0.2 volt, repair open in harness between ECM and front O2S or poor contact in ECM connector. If voltage is 0.2 volt or greater, check for poor contact in front O2S connector and repair as necessary. If terminal contact is okay, replace front O2S.
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