Posts Tagged: what is wrong with oxygen sensor

P0130

Fix code P0130 Oxygen Sensor 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 The PCM sends a reference voltage (usually 5-volts) to the variable resistor in the oxygen sensor and looks for a return voltage. At during cranking, it expects to see the full reference voltage return to the PCM since a cold oxygen sensor usually doesn’t alter the incoming reference signal until it heats up. If the PCM doesn’t see the expected … Read More