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P0150 is a diagnostic trouble code (DTC) for "O2 Sensor Circuit Malfunction (Bank 2, Sensor 1)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)
P0150 is the OBD-II generic code indicating the O2 sensor 1 for bank 2 fails to meet the minimum or maximum voltage limits calibrated into the Engine Control Module (ECM).
The ECM monitors the O2 sensor’s highest and lowest voltages. In the case of the P0150 code, the voltages coming from the O2 sensor are not within specifications.
The ECM detects a voltage problem and turns on the Check Engine Light.
Exhaust leaks in front of the sensor cause an erratic reading from the sensor.
Scans codes and documents freeze frame data, then clears codes to verify failure
Monitors O2 sensor data for the voltage to be switching back and forth between .2 volts and 1.2 volts, and replaces the sensor if not within specifications
Checks the O2 sensor wiring and the harness connections for any corrosion. Repairs or replaces any connections with problems
Checks the exhaust for leaks before the sensor and repairs any leaks that can cause the sensor to be affected from the leak
Follows the manufacturer's specific pinpoint tests for further diagnosis
Follow these simple guidelines to prevent mistakes:
Fix exhaust leaks before the sensor to prevent incorrect readings.
The O2 sensor may be getting oil or coolant contaminants and should be fixed before the O2 sensor is replaced.
Repair any harness that is damaged properly - without taking shortcuts - to prevent a failed circuit.
An exhaust manifold leak can cause the O2 sensor to think there is too much oxygen in the exhaust and the ECM will enrichen the mixture to compensate, thus using excessive fuel.
The O2 sensor may not read correctly if the exhaust leaks in front of the sensor.
The ECM may stay in open loop until the O2 system is repaired or the O2 sensor starts working again, causing extended rich conditions that could possibly damage other engine components.
The O2 sensor circuit for bank 2 sensor 1 is used to give a voltage feedback to the ECM to control the fuel-to-air ratio for the bank 2 of the engine.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6220 to have this issue resolved.