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Posts Tagged: trouble code P0135

P0135 O2 Sensor Heater Circuit Malfunction

Fix code P0135 P0135 Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1). This sensor is located on the engine bank that houses #1 cylinder and is located BEFORE the catalytic converter When you turn the ignition switch to RUN, the vehicle provides to the heater circuit of the oxygen sensor. The oxygen sensor heater is a critical part of the vehicle’s emission system because it brings the oxygen sensor up to operating temperature much faster than from the heat of the exhaust alone. Oxygen sensor heater receives ground from … Read More

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