P0132 trouble code

Learn what a P0132 trouble code is and how to fix it

P0132 trouble code O2 Sensor Circuit High Voltage (Bank 1 Sensor 1) This sensor is located on the engine bank that houses #1 cylinder and is located BEFORE the catalytic converter

The PCM sends a reference voltage (usually 5 volts) to the variable resistor in the oxygen sensor and looks for a return voltage. Once the sensor is heated up, the PCM expects to see a varying voltage. If the PCM sees a constant high, it will set a trouble code P0132.

What causes a this trouble code?

Since the voltage is high, the oxygen sensor is seeing a constantly rich fuel condition in the exhaust. Most auto parts stores will tell you to replace the oxygen sensor. WRONG! It may be bad, but the sensor itself is the most UNLIKELY cause of the trouble code.

The most common causes of a P0132 trouble code

• Leaking fuel injectors
• High fuel pressure due to a bad fuel pressure regulator
• Reduced air intake

All those problems can cause extra fuel into the engine that can’t be controlled by the PCM, Also, look for a bad MAP sensor that’s reporting a vacuum reading higher than actual engine vacuum.

To learn how to replace an oxygen sensor, click here

© 2012 Rick Muscoplat

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