DTC P0131: Ho2S No. 1 Circuit, Low Input, Or DTC P0132: Ho2S No. 1 Circuit, High Input: Condition
DTC P0131 is set when HO2S No. 1 maximum output voltage is .06 volts or less and average minimum output voltage is .03 volt or less. DTC P0132 is set when HO2S No. 1 maximum output voltage is .74 volts or more and average minimum output voltage is .33 volts or more. MIL is illuminated when Power Control Module (PCM) detects malfunction during 2 consecutive drive cycles. Possible causes are:
- HO2S No. 1 malfunction.
- Fuel system malfunction.
- PCM malfunction.