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Posts Tagged: replaced oxygen sensor and still have code

P0136

Fix code P0136 Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 2). This sensor is located on the engine bank that houses #1 cylinder and is located AFTER the catalytic converter When you turn the ignition switch to RUN, power is provided to the heater circuit of the oxygen sensor. The heater gets its ground from the PCM so it can monitor heater operation. If the heater doesn’t return ground to the PCM, it sets trouble code P0136 Most common causes are: Blown fuse, short to ground, dead heater in … Read More

P0135 O2 Sensor Heater Circuit Malfunction

Fix code P0135 P0135 Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1). This sensor is located on the engine bank that houses #1 cylinder and is located BEFORE the catalytic converter When you turn the ignition switch to RUN, the vehicle provides to the heater circuit of the oxygen sensor. The oxygen sensor heater is a critical part of the vehicle’s emission system because it brings the oxygen sensor up to operating temperature much faster than from the heat of the exhaust alone. Oxygen sensor heater receives ground from … Read More

P0134 Oxygen sensor

Fix code P0134 Oxygen sensor A P0134 trouble code is defined as Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1). This oxygen sensor is located on the engine bank that houses #1 cylinder and is located BEFORE the catalytic converter In older Zirconia oxygen sensors, the PCM expects to see a rapidly changing voltage varying from .1-volts to .95-volts. A Zirconia sensor generates its own voltage based on the difference in oxygen levels between what it see in the atmosphere and the exhaust stream. If the PCM detects … Read More

P0133 trouble code

Fix code P0133 trouble code A P0133 trouble code Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 1) to changes in fuel delivery. 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. It expects to see a rapidly changing return voltage varying from .1-volts to .95-volts. If the voltage doesn’t switch rapidly, the PCM will set a trouble … Read More

P0132 trouble code

Fix code P0132 trouble code 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 P0132 … Read More

P0131

Fix code P0131 Oxygen Sensor Circuit Low 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 low voltage, it will set a trouble code P0131. Most common causes are: vacuum leak that’s allowing … Read More


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