P0131 – O2 Circuit Low Voltage (Bank 1, Sensor 1)

P0131 – O2 Circuit Low Voltage (Bank 1, Sensor 1)
P0132 – O2 Circuit High Voltage (Bank 1, Sensor 1)
For Vehicles With Universal HO2S
Description:                
The powertrain control module (PCM) monitors the universal heated oxygen sensor (HO2S) for a circuit concern. This DTC sets when the PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas.
Possible Causes:       
 
UO2S circuit short to voltage
 
UO2SPC circuit short to voltage
UO2SPCT circuit short to voltage
 
UO2SGREF circuit short to voltage
Diagnostic Aids:
For Vehicles With HO2S (4-pin)
Description:                
The heated oxygen sensor (HO2S) signals are monitored for an over voltage condition. For Fiesta, this DTC sets if the HO2S signal voltage is 1.1 volts or greater. For all others, this DTC sets if the HO2S signal voltage is 1.5 volts or greater.
Possible Causes:       
 
HO2S circuit short to voltage
Diagnostic Aids:          An HO2S PID switching across 0.45 volt from 0.2 to 0.9 volts indicates a normal switching HO2S. For Fiesta, an HO2S PID voltage of 1.1 volts or greater indicates a short to voltage. For all others, an HO2S PID voltage of 1.5 volts or greater indicates a short to voltage.
Related Topics  P0017 - Crankshaft Position - Camshaft Position Correlation - Bank 1 Sensor B

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