General Information

P0132 O2 Sensor Circuit High Voltage (Bank 1 / Sensor 1)

General Information

Component Location





General Description

The linear O2 sensor is mounted on the front side of the Catalytic Converter (warm-up catalytic converter) or in the front exhaust pipe. It detects a wide range of air/fuel ratios in the exhaust gas from the rich to lean regions. This linear O2 sensor produces a current that corresponds to a specific air/fuel ratio. The PCM monitors this signal and determines whether the air/fuel mixture is rich or lean. The PCM constantly monitors the linear O2 sensor and increases or decreases the fuel injection duration using this signal. This is called closed-loop fuel control operation.

DTC Description

PCM sets DTC P0132 if the HO2S (B1S1) voltage remains excessively high for a predetermined time.

DTC Detecting Condition





Diagnostic Circuit Diagram





Signal Waveform & Data








1. Normal value with idle after warm up : Signal is switching from rich (above 0.45 V) to lean (below 0.45 V) a minimum of 3 times in 10 seconds.
2. GDS display with open in signal circuit : Approx. 0.43 - 0.45 V