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P0157

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P0157 OBD-II Trouble Code: 02 Sensor Circuit Low Voltage (Bank 2 Sensor 2)
P0157 code definition Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2) What the...

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Trouble running when the engine warms up, dash lights on - 2007 Subaru B9 Tribeca
The P0137/P0157 codes indicate the "rear" (behind the catalytic converters) oxygen sensors are not functioning properly. In turn, they are signaling (incorrectly) for more fuel, which is causing the P0172/P0175 over-rich codes. This is clogging your converters, as well as...

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