P0132 Code - O2 Sensor Circuit High Voltage Bank 1 Sensor 1

What Does P0132 Mean?

OBD-II Code P0132 is caused by an oxygen sensor circuit high voltage (Bank 1, Sensor 1).

This code is triggered when the powertrain computer or PCM determines that the oxygen sensor voltage remained above 450 millivolts for more than twenty seconds (varies with vehicle make and model) or that the air fuel ratio sensor remained in a rich-biased mode for too long (varies with vehicle make and model).

The purpose of the oxygen sensor is to measure the oxygen content in the exhaust gases after they leave the combustion process of the engine. This data is vital in order for the engine to produce the best power while at the same time, producing the lowest possible amount of air pollution. If there is too little oxygen in the exhaust, it means the engine is running too rich and using excessive fuel. This wastes fuel and pollutes the air with carbon monoxide. When this occurs, the Power Train Control Module or PCM will cut back on the amount of fuel it delivers to the engine. If there is too little oxygen in the exhaust, this means that the engine is running too lean and is polluting the air with poisonous nitrogen oxides and raw hydrocarbons. When this occurs, the PCM will increase the amount of fuel delivered to the engine.

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What are the common causes of P0132 ?

Depending on year, make, and model, DTC P0132 may have number of causes. Here are some of the most common.

• HO2S Fault – The most common failure is a fault in the sensor itself. Constantly exposed to the elements and to the heat of exhaust, HO2S has a typical lifespan of less than 5 years.
• Circuit Fault – Because they are exposed to the elements, wire harnesses, connectors, and the sensor itself may be physically damaged by impact or road debris. Water entry and corrosion are common faults.

How To Fix P0132 ?

Now, clear the codes and test-drive the vehicle to see if the code is reset. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition.



Process Tips

Diagnostic trouble code P0132 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before P0132.

Fortunately, P0132 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

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