Fix code P0133
Oxygen Sensor Circuit Slow Response (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. 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 code P0133.
Most common causes are: “Lazy” worn sensor, contaminated sensor, leak in exhaust system
To learn how to replace an oxygen sensor, click here
© 2012 Rick Muscoplat
Posted on by Rick Muscoplat