P0138 Mazda 3 - Search Videos

Mazda 3 P0138: Oxygen Sensor High Voltage (Bank 1 -Sensor 2) | Drivetrain Resource

Mazda 3 P0138: Oxygen Sensor High Voltage (Bank 1 -Sensor 2) | Drivetrain Resource

P0138 is a common OBDII code that occurs in many vehicles, including theMazda 3. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself There are also some less likely problems

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