Posts Tagged: P0133
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
P0133 Code — What it means and the most common causes
Learn what a P0133 code means, the most common causes and how to fix it A P0133 code is defined as: 02 Sensor Circuit Slow Response (Bank 1 Sensor 1). Bank 1 is the bank that holds cylinder #1 and sensor 1 is the sensor upstream from the catalytic converter. The code means that the upstream oxygen sensor on the exhaust from bank 1 isn’t reacting as quickly as it should to changing oxygen levels. The ECM is constantly updating the air/fuel mixture and overshooting and undershooting the 14.7:1 ratio. … Read More