What the P0151 code means. P0151 is the OBD-II generic code indicating the O2 sensor for bank 2 sensor 1 fails to increase the voltage output above . 21 volts, indicating excessive oxygen in the exhaust.
What would cause a P0151 code?
Diagnostic trouble code (DTC) P0151 stands for “O2 Sensor Circuit Low Voltage (Bank 2, Sensor 1). It means that the oxygen sensor’s voltage has remained lower than factory specifications for a certain amount of time. P0151 code warns about a fault with the upstream oxygen sensor on Bank 2.
How do you fix a high voltage O2 sensor?
Zitat von Youtube: Make sure the new injector has new seals. And never use the old seals. Over when you change the fuel injectors. Change them all as a set otherwise the engine will run unevenly.
How do you fix a low voltage O2 sensor?
Repair any exhaust leaks before the sensor to prevent excess oxygen getting into the exhaust stream causing the low voltage readings. Check the O2 sensor for oil or coolant contaminants that could foul the sensor. Repair any harness that is damaged properly to prevent erratic readings from the sensors.
What would cause a high voltage O2 sensor?
The high voltage condition from the O2 sensor is indicating a lack of oxygen in the exhaust or other related problems, such as a leaking fuel injector or a broken up catalyst inside.
What side is bank 2 sensor 1?
Bank 2 Sensor 1 (a.k.a. B2S1) is located on the side of the engine with cylinder 2 in the firing order and the O2 sensor situated in front of the catalytic converter. Depending on the car’s make and driver orientation, it could be found on either the driver or passenger side of a vehicle.
What O2 sensor is bank 2 sensor 2?
Diagnostic Trouble Code (DTC) P0158 stands for O2 Sensor Circuit High Voltage (Bank 2, Sensor 2). The O2 sensor 2 is the downstream O2 sensor and it measures the amount of oxygen in the exhaust gases leaving the catalytic converter (cat).
What does a high voltage code mean?
When trouble code P0138 is set, this indicates that there is a high voltage (steadily above . 9 volts) for more than 10 seconds indicating a lack of oxygen in the exhaust stream and an abundance of fuel at sensor 2 on the bank 1 of the engine.
What causes a high circuit?
This happens when the oxygen sensor voltage stays above a certain threshold for a select amount of time. The code is also triggered if the air-fuel ratio stayed in a rich-biased condition for too long. Take note that what’s considered as “too long” varies depending on your vehicle’s make and model.
How do you check voltage on a O2 sensor?
Zitat von Youtube: And obviously you want to put your setting on your multimeter. 2 to 2 volts. Since you know we're measuring between point zero to one wall. And also connect your wires.
How do I fix code P0151?
What repairs can fix the P0151 code?
- Replacing the O2 sensor for bank 2 sensor 1 if all tests indicate a failed sensor.
- Repairing or replacing the wiring or connection to the O2 sensor for bank 2 sensor 1.
- Repairing exhaust leaks before the sensor that introduce excessive oxygen into the exhaust.
What causes O2 sensor code?
An engine misfire, leaky exhaust valve or a leak in the exhaust manifold gasket that allows air into the exhaust may also cause this type of code to be set. If an O2 sensor has failed, especially prematurely, the cause often is contamination. Like us, O2 sensors slow down as they age.