Causes and Fixes P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)

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How to fix P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)
An oxygen sensor monitors how much oxygen was burnt off during combustion. The computer uses the information to adjust the air/fuel ratio mixture.
Oxygen sensors have heating elements that preheats the sensor during cold start conditions. This speeds up the process of getting the oxygen sensor up to operating temperature.
Common causes of a P0155 code include an open heater power (usually 12v) circuit, a damaged connector, and a defective oxygen sensor heater element.

Possible Causes of a P0155 Code:
Faulty 02 Sensor Bank-2 Sensor-1
Wiring - Open Short - Blown Fuse

By using this information user assumes all risk of use.

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