What does the p0139 code on the O2 sensor mean?
Although the signal from the front sensor (sensor 1) changes far more rapidly than that of the rear (sensor 2), both change over time. When the rear oxygen sensor mounted on engine bank 1 doesn’t transition between voltage states fast enough, the engine computer logs a P0139 code. What Does the P0139 Code Mean?
Can a p0139 error cause a car to stall?
Though Error Code P0139 is not that bad compared to most error codes, pumping fuel upon deceleration is an expensive inconvenience as it can definitely increase the vehicle’s fuel consumption. It may cause the engine to stall when coming to a stop if there is an excessive amount of fuel leaking into the cylinders.
Where is the O2 sensor located on a car?
If the O2 sensor for Bank 1 Sensor 2 doesn’t respond to the fuel cut-off within 7 seconds (or more, depending on the make and model of the vehicle), then it triggers the error code. This involves the O2 sensor located at the rear side of the driver.
What should I do if my O2 sensor is slow?
A qualified technician will start by clearing the code and take the vehicle for a test drive while duplicating the conditions when the code was set, such as load, speed, RPM etc, and monitor the scan tool if the error code comes back. He will also check the O2 sensor data to see whether the voltage drops below 0.2V at deceleration.
What does p0139 mean on an oxygen sensor?
Error Code P0139 is described as Oxygen Sensor Circuit Slow Response Bank 1, Sensor 2. Meaning, the O2 Sensor Bank 1, Sensor 2 has failed to deliver a voltage drop of 0.2V for 7 seconds at deceleration fuel cut off. It tells the PCM (powertrain control module, also known as ECM or engine control module) that the sensor is responding too slowly.
What does p0139 stand for on a PCM?
If the rear sensor’s signal is slow to change or does not change at all, the PCM may log code P0139. Note: The definition of code P0139 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.
Though Error Code P0139 is not that bad compared to most error codes, pumping fuel upon deceleration is an expensive inconvenience as it can definitely increase the vehicle’s fuel consumption. It may cause the engine to stall when coming to a stop if there is an excessive amount of fuel leaking into the cylinders.
Why is the O2 sensor on my car not working?
This code is usually caused by excessive fuel in exhaust stream caused by possible leak in the fuel injection system. Other possible causes include: Faulty O2 sensor. Faulty rear O2 sensor wiring. Exhaust leak.
What is the cause of the code p0138?
What Is the Cause of Code P0138? 1 Faulty O2 Sensor 2 Short to battery voltage in O2 sensor signal circuit 3 Corroded wiring 4 Fuel pressure too high 5 Engine coolant temperature sensor
What is the diagnostic code for O2 sensor circuit Bank 2?
P0138 is a diagnostic trouble code (DTC) for “O2 Sensor Circuit High Voltage (Bank 1, Sensor 2)”.
Which is the first sensor in the PCM?
The first sensor (or Sensor 1) is the upstream oxygen sensor that aids the PCM in regulating the vehicle’s air/fuel ratio. Sensor 2, also known as the downstream oxygen sensor, monitors the catalytic converter to check its performance.
Although the signal from the front sensor (sensor 1) changes far more rapidly than that of the rear (sensor 2), both change over time. When the rear oxygen sensor mounted on engine bank 1 doesn’t transition between voltage states fast enough, the engine computer logs a P0139 code. What Does the P0139 Code Mean?
What Is the Cause of Code P0138? 1 Faulty O2 Sensor 2 Short to battery voltage in O2 sensor signal circuit 3 Corroded wiring 4 Fuel pressure too high 5 Engine coolant temperature sensor
What causes engine to stall with p0139 code?
This can be caused by excessive fuel still in the exhaust stream from possible leaking in the fuel injection system. What are the symptoms of the P0139 code? The engine may stall or run rough on deceleration if excessive fuel is getting in the engine.
P0138 is a diagnostic trouble code (DTC) for “O2 Sensor Circuit High Voltage (Bank 1, Sensor 2)”.